Lifting algebraic data classes along injective/surjective maps

This file provides definitions that are meant to deal with situations such as the following:

Suppose that G is a group, and H is a type endowed with One H, Mul H, and Inv H. Suppose furthermore, that f : G → H is a surjective map that respects the multiplication, and the unit elements. Then H satisfies the group axioms.

The relevant definition in this case is Function.Surjective.group. Dually, there is also Function.Injective.group. And there are versions for (additive) (commutative) semigroups/monoids.

Implementation note

The nsmul and zsmul assumptions on any tranfer definition for an algebraic structure involving both addition and multiplication (eg AddMonoidWithOne) is ∀ n x, f (n • x) = n • f x, which is what we would expect. However, we cannot do the same for transfer definitions built using to_additive (eg AddMonoid) as we want the multiplicative versions to be ∀ x n, f (x ^ n) = f x ^ n. As a result, we must use Function.swap when using additivised transfer definitions in non-additivised ones.

Injective

theorem Function.Injective.addSemigroup.proof_1 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [AddSemigroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (x : M₁) (y : M₁) (z : M₁) : x + y + z = x + (y + z)

@[reducible]

def Function.Injective.addSemigroup {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [AddSemigroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) : AddSemigroup M₁

A type endowed with + is an additive semigroup, if it admits an injective map that preserves + to an additive semigroup.

Equations

• Function.Injective.addSemigroup f hf mul = let __src := inst✝; AddSemigroup.mk ⋯

@[reducible]

def Function.Injective.semigroup {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [Semigroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) : Semigroup M₁

A type endowed with * is a semigroup, if it admits an injective map that preserves * to a semigroup. See note [reducible non-instances].

Equations

• Function.Injective.semigroup f hf mul = let __src := inst✝; Semigroup.mk ⋯

theorem Function.Injective.addCommMagma.proof_1 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [AddCommMagma M₂] (f : M₁ → M₂) (hf : Function.Injective f) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (x : M₁) (y : M₁) : x + y = y + x

@[reducible]

def Function.Injective.addCommMagma {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [AddCommMagma M₂] (f : M₁ → M₂) (hf : Function.Injective f) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) : AddCommMagma M₁

A type endowed with + is an additive commutative semigroup, if it admits a surjective map that preserves + from an additive commutative semigroup.

Equations

• Function.Injective.addCommMagma f hf mul = AddCommMagma.mk ⋯

@[reducible]

def Function.Injective.commMagma {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [CommMagma M₂] (f : M₁ → M₂) (hf : Function.Injective f) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) : CommMagma M₁

A type endowed with * is a commutative magma, if it admits a surjective map that preserves * from a commutative magma.

Equations

• Function.Injective.commMagma f hf mul = CommMagma.mk ⋯

@[reducible]

def Function.Injective.addCommSemigroup {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [AddCommSemigroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) : AddCommSemigroup M₁

A type endowed with + is an additive commutative semigroup,if it admits an injective map that preserves + to an additive commutative semigroup.

Equations

• Function.Injective.addCommSemigroup f hf mul = let __spread.0 := Function.Injective.addCommMagma f hf mul; AddCommSemigroup.mk ⋯

@[reducible]

def Function.Injective.commSemigroup {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [CommSemigroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) : CommSemigroup M₁

A type endowed with * is a commutative semigroup, if it admits an injective map that preserves * to a commutative semigroup. See note [reducible non-instances].

Equations

• Function.Injective.commSemigroup f hf mul = let __spread.0 := Function.Injective.commMagma f hf mul; CommSemigroup.mk ⋯

theorem Function.Injective.addLeftCancelSemigroup.proof_1 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [AddLeftCancelSemigroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (x : M₁) (y : M₁) (z : M₁) (H : x + y = x + z) : y = z

@[reducible]

def Function.Injective.addLeftCancelSemigroup {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [AddLeftCancelSemigroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) : AddLeftCancelSemigroup M₁

A type endowed with + is an additive left cancel semigroup, if it admits an injective map that preserves + to an additive left cancel semigroup.

Equations

• Function.Injective.addLeftCancelSemigroup f hf mul = let __src := Function.Injective.addSemigroup f hf mul; AddLeftCancelSemigroup.mk ⋯

@[reducible]

def Function.Injective.leftCancelSemigroup {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [LeftCancelSemigroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) : LeftCancelSemigroup M₁

A type endowed with * is a left cancel semigroup, if it admits an injective map that preserves * to a left cancel semigroup. See note [reducible non-instances].

Equations

• Function.Injective.leftCancelSemigroup f hf mul = let __src := Function.Injective.semigroup f hf mul; LeftCancelSemigroup.mk ⋯

theorem Function.Injective.addRightCancelSemigroup.proof_1 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [AddRightCancelSemigroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (x : M₁) (y : M₁) (z : M₁) (H : x + y = z + y) : x = z

@[reducible]

def Function.Injective.addRightCancelSemigroup {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [AddRightCancelSemigroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) : AddRightCancelSemigroup M₁

A type endowed with + is an additive right cancel semigroup, if it admits an injective map that preserves + to an additive right cancel semigroup.

Equations

• Function.Injective.addRightCancelSemigroup f hf mul = let __src := Function.Injective.addSemigroup f hf mul; AddRightCancelSemigroup.mk ⋯

@[reducible]

def Function.Injective.rightCancelSemigroup {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [RightCancelSemigroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) : RightCancelSemigroup M₁

A type endowed with * is a right cancel semigroup, if it admits an injective map that preserves * to a right cancel semigroup. See note [reducible non-instances].

Equations

• Function.Injective.rightCancelSemigroup f hf mul = let __src := Function.Injective.semigroup f hf mul; RightCancelSemigroup.mk ⋯

theorem Function.Injective.addZeroClass.proof_1 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [AddZeroClass M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (x : M₁) : 0 + x = x

theorem Function.Injective.addZeroClass.proof_2 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [AddZeroClass M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (x : M₁) : x + 0 = x

@[reducible]

def Function.Injective.addZeroClass {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [AddZeroClass M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) : AddZeroClass M₁

A type endowed with 0 and + is an AddZeroClass, if it admits an injective map that preserves 0 and + to an AddZeroClass.

Equations

• Function.Injective.addZeroClass f hf one mul = let __src := inst✝; let __src_1 := inst✝¹; AddZeroClass.mk ⋯ ⋯

@[reducible]

def Function.Injective.mulOneClass {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [One M₁] [MulOneClass M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) : MulOneClass M₁

A type endowed with 1 and * is a MulOneClass, if it admits an injective map that preserves 1 and * to a MulOneClass. See note [reducible non-instances].

Equations

• Function.Injective.mulOneClass f hf one mul = let __src := inst✝; let __src_1 := inst✝¹; MulOneClass.mk ⋯ ⋯

theorem Function.Injective.addMonoid.proof_2 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [AddMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (n : ℕ) (x : M₁) : (fun (n : ℕ) (x : M₁) => n • x) (n + 1) x = (fun (n : ℕ) (x : M₁) => n • x) n x + x

theorem Function.Injective.addMonoid.proof_1 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [AddMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (x : M₁) : (fun (n : ℕ) (x : M₁) => n • x) 0 x = 0

@[reducible]

def Function.Injective.addMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [AddMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) : AddMonoid M₁

A type endowed with 0 and + is an additive monoid, if it admits an injective map that preserves 0 and + to an additive monoid. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Injective.monoid {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [One M₁] [Pow M₁ ℕ] [Monoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) : Monoid M₁

A type endowed with 1 and * is a monoid, if it admits an injective map that preserves 1 and * to a monoid. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Injective.addMonoidWithOne {M₂ : Type u_2} {M₁ : Type u_3} [Zero M₁] [One M₁] [Add M₁] [SMul ℕ M₁] [NatCast M₁] [AddMonoidWithOne M₂] (f : M₁ → M₂) (hf : Function.Injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ (x y : M₁), f (x + y) = f x + f y) (nsmul : ∀ (n : ℕ) (x : M₁), f (n • x) = n • f x) (natCast : ∀ (n : ℕ), f ↑n = ↑n) : AddMonoidWithOne M₁

A type endowed with 0, 1 and + is an additive monoid with one, if it admits an injective map that preserves 0, 1 and + to an additive monoid with one. See note [reducible non-instances].

Equations

• Function.Injective.addMonoidWithOne f hf zero one add nsmul natCast = let __src := Function.Injective.addMonoid f hf zero add ⋯; AddMonoidWithOne.mk ⋯ ⋯

@[reducible]

def Function.Injective.addLeftCancelMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [AddLeftCancelMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) : AddLeftCancelMonoid M₁

A type endowed with 0 and + is an additive left cancel monoid, if it admits an injective map that preserves 0 and + to an additive left cancel monoid.

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Injective.leftCancelMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [One M₁] [Pow M₁ ℕ] [LeftCancelMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) : LeftCancelMonoid M₁

A type endowed with 1 and * is a left cancel monoid, if it admits an injective map that preserves 1 and * to a left cancel monoid. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Injective.addRightCancelMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [AddRightCancelMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) : AddRightCancelMonoid M₁

A type endowed with 0 and + is an additive left cancel monoid,if it admits an injective map that preserves 0 and + to an additive left cancel monoid.

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Injective.rightCancelMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [One M₁] [Pow M₁ ℕ] [RightCancelMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) : RightCancelMonoid M₁

A type endowed with 1 and * is a right cancel monoid, if it admits an injective map that preserves 1 and * to a right cancel monoid. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Injective.addCancelMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [AddCancelMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) : AddCancelMonoid M₁

A type endowed with 0 and + is an additive left cancel monoid,if it admits an injective map that preserves 0 and + to an additive left cancel monoid.

Equations

• One or more equations did not get rendered due to their size.

theorem Function.Injective.addCancelMonoid.proof_1 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [AddCancelMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (a : M₁) (b : M₁) (c : M₁) : a + b = c + b → a = c

@[reducible]

def Function.Injective.cancelMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [One M₁] [Pow M₁ ℕ] [CancelMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) : CancelMonoid M₁

A type endowed with 1 and * is a cancel monoid, if it admits an injective map that preserves 1 and * to a cancel monoid. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Injective.addCommMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [AddCommMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) : AddCommMonoid M₁

A type endowed with 0 and + is an additive commutative monoid, if it admits an injective map that preserves 0 and + to an additive commutative monoid.

Equations

• Function.Injective.addCommMonoid f hf one mul npow = let __src := Function.Injective.addMonoid f hf one mul npow; let __src_1 := Function.Injective.addCommSemigroup f hf mul; AddCommMonoid.mk ⋯

@[reducible]

def Function.Injective.commMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [One M₁] [Pow M₁ ℕ] [CommMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) : CommMonoid M₁

A type endowed with 1 and * is a commutative monoid, if it admits an injective map that preserves 1 and * to a commutative monoid. See note [reducible non-instances].

Equations

• Function.Injective.commMonoid f hf one mul npow = let __src := Function.Injective.monoid f hf one mul npow; let __src_1 := Function.Injective.commSemigroup f hf mul; CommMonoid.mk ⋯

@[reducible]

def Function.Injective.addCommMonoidWithOne {M₂ : Type u_2} {M₁ : Type u_3} [Zero M₁] [One M₁] [Add M₁] [SMul ℕ M₁] [NatCast M₁] [AddCommMonoidWithOne M₂] (f : M₁ → M₂) (hf : Function.Injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ (x y : M₁), f (x + y) = f x + f y) (nsmul : ∀ (n : ℕ) (x : M₁), f (n • x) = n • f x) (natCast : ∀ (n : ℕ), f ↑n = ↑n) : AddCommMonoidWithOne M₁

A type endowed with 0, 1 and + is an additive commutative monoid with one, if it admits an injective map that preserves 0, 1 and + to an additive commutative monoid with one. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Injective.addCancelCommMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [AddCancelCommMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) : AddCancelCommMonoid M₁

A type endowed with 0 and + is an additive cancel commutative monoid, if it admits an injective map that preserves 0 and + to an additive cancel commutative monoid.

Equations

• One or more equations did not get rendered due to their size.

theorem Function.Injective.addCancelCommMonoid.proof_4 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [AddCancelCommMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (n : ℕ) (x : M₁) : AddMonoid.nsmul (n + 1) x = AddMonoid.nsmul n x + x

theorem Function.Injective.addCancelCommMonoid.proof_2 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [AddCancelCommMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (a : M₁) : a + 0 = a

theorem Function.Injective.addCancelCommMonoid.proof_3 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [AddCancelCommMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (x : M₁) : AddMonoid.nsmul 0 x = 0

theorem Function.Injective.addCancelCommMonoid.proof_1 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [AddCancelCommMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (a : M₁) : 0 + a = a

@[reducible]

def Function.Injective.cancelCommMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [One M₁] [Pow M₁ ℕ] [CancelCommMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) : CancelCommMonoid M₁

A type endowed with 1 and * is a cancel commutative monoid, if it admits an injective map that preserves 1 and * to a cancel commutative monoid. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Injective.involutiveNeg {M₂ : Type u_2} {M₁ : Type u_3} [Neg M₁] [InvolutiveNeg M₂] (f : M₁ → M₂) (hf : Function.Injective f) (inv : ∀ (x : M₁), f (-x) = -f x) : InvolutiveNeg M₁

A type has an involutive negation if it admits a surjective map that preserves - to a type which has an involutive negation.

Equations

• Function.Injective.involutiveNeg f hf inv = InvolutiveNeg.mk ⋯

theorem Function.Injective.involutiveNeg.proof_1 {M₂ : Type u_2} {M₁ : Type u_1} [Neg M₁] [InvolutiveNeg M₂] (f : M₁ → M₂) (hf : Function.Injective f) (inv : ∀ (x : M₁), f (-x) = -f x) (x : M₁) : - -x = x

@[reducible]

def Function.Injective.involutiveInv {M₂ : Type u_2} {M₁ : Type u_3} [Inv M₁] [InvolutiveInv M₂] (f : M₁ → M₂) (hf : Function.Injective f) (inv : ∀ (x : M₁), f x⁻¹ = (f x)⁻¹) : InvolutiveInv M₁

A type has an involutive inversion if it admits a surjective map that preserves ⁻¹ to a type which has an involutive inversion. See note [reducible non-instances]

Equations

• Function.Injective.involutiveInv f hf inv = InvolutiveInv.mk ⋯

theorem Function.Injective.negZeroClass.proof_1 {M₁ : Type u_1} {M₂ : Type u_2} [Zero M₁] [Neg M₁] [NegZeroClass M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (inv : ∀ (x : M₁), f (-x) = -f x) : -0 = 0

@[reducible]

def Function.Injective.negZeroClass {M₁ : Type u_1} {M₂ : Type u_2} [Zero M₁] [Neg M₁] [NegZeroClass M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (inv : ∀ (x : M₁), f (-x) = -f x) : NegZeroClass M₁

A type endowed with 0 and unary - is an NegZeroClass, if it admits an injective map that preserves 0 and unary - to an NegZeroClass.

Equations

• Function.Injective.negZeroClass f hf one inv = let __src := inst✝¹; let __src_1 := inst✝; NegZeroClass.mk ⋯

@[reducible]

def Function.Injective.invOneClass {M₁ : Type u_1} {M₂ : Type u_2} [One M₁] [Inv M₁] [InvOneClass M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 1 = 1) (inv : ∀ (x : M₁), f x⁻¹ = (f x)⁻¹) : InvOneClass M₁

A type endowed with 1 and ⁻¹ is a InvOneClass, if it admits an injective map that preserves 1 and ⁻¹ to a InvOneClass. See note [reducible non-instances].

Equations

• Function.Injective.invOneClass f hf one inv = let __src := inst✝¹; let __src_1 := inst✝; InvOneClass.mk ⋯

theorem Function.Injective.subNegMonoid.proof_2 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [SMul ℤ M₁] [SubNegMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (x : M₁) : (fun (n : ℤ) (x : M₁) => n • x) 0 x = 0

theorem Function.Injective.subNegMonoid.proof_3 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [SMul ℤ M₁] [SubNegMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (n : ℕ) (x : M₁) : (fun (n : ℤ) (x : M₁) => n • x) (Int.ofNat (Nat.succ n)) x = (fun (n : ℤ) (x : M₁) => n • x) (Int.ofNat n) x + x

theorem Function.Injective.subNegMonoid.proof_1 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SubNegMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (x : M₁) (y : M₁) : x - y = x + -y

@[reducible]

def Function.Injective.subNegMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SMul ℤ M₁] [SubNegMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) : SubNegMonoid M₁

A type endowed with 0, +, unary -, and binary - is a SubNegMonoid if it admits an injective map that preserves 0, +, unary -, and binary - to a SubNegMonoid. This version takes custom nsmul and zsmul as [SMul ℕ M₁] and [SMul ℤ M₁] arguments.

Equations

• One or more equations did not get rendered due to their size.

theorem Function.Injective.subNegMonoid.proof_4 {M₁ : Type u_1} {M₂ : Type u_2} [Neg M₁] [SMul ℤ M₁] [SubNegMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (inv : ∀ (x : M₁), f (-x) = -f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (n : ℕ) (x : M₁) : (fun (n : ℤ) (x : M₁) => n • x) (Int.negSucc n) x = -(fun (n : ℤ) (x : M₁) => n • x) (↑(Nat.succ n)) x

@[reducible]

def Function.Injective.divInvMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [One M₁] [Pow M₁ ℕ] [Inv M₁] [Div M₁] [Pow M₁ ℤ] [DivInvMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (inv : ∀ (x : M₁), f x⁻¹ = (f x)⁻¹) (div : ∀ (x y : M₁), f (x / y) = f x / f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) (zpow : ∀ (x : M₁) (n : ℤ), f (x ^ n) = f x ^ n) : DivInvMonoid M₁

A type endowed with 1, *, ⁻¹, and / is a DivInvMonoid if it admits an injective map that preserves 1, *, ⁻¹, and / to a DivInvMonoid. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Injective.subNegZeroMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SMul ℤ M₁] [SubNegZeroMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) : SubNegZeroMonoid M₁

A type endowed with 0, +, unary -, and binary - is a SubNegZeroMonoid if it admits an injective map that preserves 0, +, unary -, and binary - to a SubNegZeroMonoid. This version takes custom nsmul and zsmul as [SMul ℕ M₁] and [SMul ℤ M₁] arguments.

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Injective.divInvOneMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [One M₁] [Pow M₁ ℕ] [Inv M₁] [Div M₁] [Pow M₁ ℤ] [DivInvOneMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (inv : ∀ (x : M₁), f x⁻¹ = (f x)⁻¹) (div : ∀ (x y : M₁), f (x / y) = f x / f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) (zpow : ∀ (x : M₁) (n : ℤ), f (x ^ n) = f x ^ n) : DivInvOneMonoid M₁

A type endowed with 1, *, ⁻¹, and / is a DivInvOneMonoid if it admits an injective map that preserves 1, *, ⁻¹, and / to a DivInvOneMonoid. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Injective.subtractionMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SMul ℤ M₁] [SubtractionMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) : SubtractionMonoid M₁

A type endowed with 0, +, unary -, and binary - is a SubtractionMonoid if it admits an injective map that preserves 0, +, unary -, and binary - to a SubtractionMonoid. This version takes custom nsmul and zsmul as [SMul ℕ M₁] and [SMul ℤ M₁] arguments.

Equations

• One or more equations did not get rendered due to their size.

theorem Function.Injective.subtractionMonoid.proof_1 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SMul ℤ M₁] [SubtractionMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (x : M₁) (y : M₁) : -(x + y) = -y + -x

theorem Function.Injective.subtractionMonoid.proof_2 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SMul ℤ M₁] [SubtractionMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (x : M₁) (y : M₁) (h : x + y = 0) : -x = y

@[reducible]

def Function.Injective.divisionMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [One M₁] [Pow M₁ ℕ] [Inv M₁] [Div M₁] [Pow M₁ ℤ] [DivisionMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (inv : ∀ (x : M₁), f x⁻¹ = (f x)⁻¹) (div : ∀ (x y : M₁), f (x / y) = f x / f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) (zpow : ∀ (x : M₁) (n : ℤ), f (x ^ n) = f x ^ n) : DivisionMonoid M₁

A type endowed with 1, *, ⁻¹, and / is a DivisionMonoid if it admits an injective map that preserves 1, *, ⁻¹, and / to a DivisionMonoid. See note [reducible non-instances]

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Injective.subtractionCommMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SMul ℤ M₁] [SubtractionCommMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) : SubtractionCommMonoid M₁

A type endowed with 0, +, unary -, and binary - is a SubtractionCommMonoid if it admits an injective map that preserves 0, +, unary -, and binary - to a SubtractionCommMonoid. This version takes custom nsmul and zsmul as [SMul ℕ M₁] and [SMul ℤ M₁] arguments.

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Injective.divisionCommMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [One M₁] [Pow M₁ ℕ] [Inv M₁] [Div M₁] [Pow M₁ ℤ] [DivisionCommMonoid M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (inv : ∀ (x : M₁), f x⁻¹ = (f x)⁻¹) (div : ∀ (x y : M₁), f (x / y) = f x / f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) (zpow : ∀ (x : M₁) (n : ℤ), f (x ^ n) = f x ^ n) : DivisionCommMonoid M₁

A type endowed with 1, *, ⁻¹, and / is a DivisionCommMonoid if it admits an injective map that preserves 1, *, ⁻¹, and / to a DivisionCommMonoid. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

theorem Function.Injective.addGroup.proof_1 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SMul ℤ M₁] [AddGroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (x : M₁) : -x + x = 0

@[reducible]

def Function.Injective.addGroup {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SMul ℤ M₁] [AddGroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) : AddGroup M₁

A type endowed with 0 and + is an additive group, if it admits an injective map that preserves 0 and + to an additive group.

Equations

• Function.Injective.addGroup f hf one mul inv div npow zpow = let __src := Function.Injective.subNegMonoid f hf one mul inv div npow zpow; AddGroup.mk ⋯

@[reducible]

def Function.Injective.group {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [One M₁] [Pow M₁ ℕ] [Inv M₁] [Div M₁] [Pow M₁ ℤ] [Group M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (inv : ∀ (x : M₁), f x⁻¹ = (f x)⁻¹) (div : ∀ (x y : M₁), f (x / y) = f x / f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) (zpow : ∀ (x : M₁) (n : ℤ), f (x ^ n) = f x ^ n) : Group M₁

A type endowed with 1, * and ⁻¹ is a group, if it admits an injective map that preserves 1, * and ⁻¹ to a group. See note [reducible non-instances].

Equations

• Function.Injective.group f hf one mul inv div npow zpow = let __src := Function.Injective.divInvMonoid f hf one mul inv div npow zpow; Group.mk ⋯

@[reducible]

def Function.Injective.addGroupWithOne {M₂ : Type u_2} {M₁ : Type u_3} [Zero M₁] [One M₁] [Add M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SMul ℤ M₁] [NatCast M₁] [IntCast M₁] [AddGroupWithOne M₂] (f : M₁ → M₂) (hf : Function.Injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ (x y : M₁), f (x + y) = f x + f y) (neg : ∀ (x : M₁), f (-x) = -f x) (sub : ∀ (x y : M₁), f (x - y) = f x - f y) (nsmul : ∀ (n : ℕ) (x : M₁), f (n • x) = n • f x) (zsmul : ∀ (n : ℤ) (x : M₁), f (n • x) = n • f x) (natCast : ∀ (n : ℕ), f ↑n = ↑n) (intCast : ∀ (n : ℤ), f ↑n = ↑n) : AddGroupWithOne M₁

A type endowed with 0, 1 and + is an additive group with one, if it admits an injective map that preserves 0, 1 and + to an additive group with one. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

theorem Function.Injective.addCommGroup.proof_1 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SMul ℤ M₁] [AddCommGroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (a : M₁) (b : M₁) : a - b = a + -b

theorem Function.Injective.addCommGroup.proof_4 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SMul ℤ M₁] [AddCommGroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (n : ℕ) (a : M₁) : SubNegMonoid.zsmul (Int.negSucc n) a = -SubNegMonoid.zsmul (↑(Nat.succ n)) a

@[reducible]

def Function.Injective.addCommGroup {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SMul ℤ M₁] [AddCommGroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) : AddCommGroup M₁

A type endowed with 0 and + is an additive commutative group, if it admits an injective map that preserves 0 and + to an additive commutative group.

Equations

• One or more equations did not get rendered due to their size.

theorem Function.Injective.addCommGroup.proof_2 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SMul ℤ M₁] [AddCommGroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (a : M₁) : SubNegMonoid.zsmul 0 a = 0

theorem Function.Injective.addCommGroup.proof_3 {M₁ : Type u_1} {M₂ : Type u_2} [Add M₁] [Zero M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SMul ℤ M₁] [AddCommGroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (n : ℕ) (a : M₁) : SubNegMonoid.zsmul (Int.ofNat (Nat.succ n)) a = SubNegMonoid.zsmul (Int.ofNat n) a + a

@[reducible]

def Function.Injective.commGroup {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₁] [One M₁] [Pow M₁ ℕ] [Inv M₁] [Div M₁] [Pow M₁ ℤ] [CommGroup M₂] (f : M₁ → M₂) (hf : Function.Injective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (inv : ∀ (x : M₁), f x⁻¹ = (f x)⁻¹) (div : ∀ (x y : M₁), f (x / y) = f x / f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) (zpow : ∀ (x : M₁) (n : ℤ), f (x ^ n) = f x ^ n) : CommGroup M₁

A type endowed with 1, * and ⁻¹ is a commutative group, if it admits an injective map that preserves 1, * and ⁻¹ to a commutative group. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Injective.addCommGroupWithOne {M₂ : Type u_2} {M₁ : Type u_3} [Zero M₁] [One M₁] [Add M₁] [SMul ℕ M₁] [Neg M₁] [Sub M₁] [SMul ℤ M₁] [NatCast M₁] [IntCast M₁] [AddCommGroupWithOne M₂] (f : M₁ → M₂) (hf : Function.Injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ (x y : M₁), f (x + y) = f x + f y) (neg : ∀ (x : M₁), f (-x) = -f x) (sub : ∀ (x y : M₁), f (x - y) = f x - f y) (nsmul : ∀ (n : ℕ) (x : M₁), f (n • x) = n • f x) (zsmul : ∀ (n : ℤ) (x : M₁), f (n • x) = n • f x) (natCast : ∀ (n : ℕ), f ↑n = ↑n) (intCast : ∀ (n : ℤ), f ↑n = ↑n) : AddCommGroupWithOne M₁

A type endowed with 0, 1 and + is an additive commutative group with one, if it admits an injective map that preserves 0, 1 and + to an additive commutative group with one. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

Surjective

@[reducible]

def Function.Surjective.addSemigroup {M₁ : Type u_1} {M₂ : Type u_2} [Add M₂] [AddSemigroup M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) : AddSemigroup M₂

A type endowed with + is an additive semigroup, if it admits a surjective map that preserves + from an additive semigroup.

Equations

• Function.Surjective.addSemigroup f hf mul = let __src := inst✝; AddSemigroup.mk ⋯

theorem Function.Surjective.addSemigroup.proof_1 {M₁ : Type u_2} {M₂ : Type u_1} [Add M₂] [AddSemigroup M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (y₁ : M₂) (y₂ : M₂) (y₃ : M₂) : y₁ + y₂ + y₃ = y₁ + (y₂ + y₃)

@[reducible]

def Function.Surjective.semigroup {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₂] [Semigroup M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) : Semigroup M₂

A type endowed with * is a semigroup, if it admits a surjective map that preserves * from a semigroup. See note [reducible non-instances].

Equations

• Function.Surjective.semigroup f hf mul = let __src := inst✝; Semigroup.mk ⋯

@[reducible]

def Function.Surjective.addCommMagma {M₁ : Type u_1} {M₂ : Type u_2} [Add M₂] [AddCommMagma M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) : AddCommMagma M₂

A type endowed with + is an additive commutative semigroup, if it admits a surjective map that preserves + from an additive commutative semigroup.

Equations

• Function.Surjective.addCommMagma f hf mul = AddCommMagma.mk ⋯

theorem Function.Surjective.addCommMagma.proof_1 {M₁ : Type u_2} {M₂ : Type u_1} [Add M₂] [AddCommMagma M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (y₁ : M₂) (y₂ : M₂) : y₁ + y₂ = y₂ + y₁

@[reducible]

def Function.Surjective.commMagma {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₂] [CommMagma M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) : CommMagma M₂

A type endowed with * is a commutative semigroup, if it admits a surjective map that preserves * from a commutative semigroup. See note [reducible non-instances].

Equations

• Function.Surjective.commMagma f hf mul = CommMagma.mk ⋯

@[reducible]

def Function.Surjective.addCommSemigroup {M₁ : Type u_1} {M₂ : Type u_2} [Add M₂] [AddCommSemigroup M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) : AddCommSemigroup M₂

A type endowed with + is an additive commutative semigroup, if it admits a surjective map that preserves + from an additive commutative semigroup.

Equations

• Function.Surjective.addCommSemigroup f hf mul = let __spread.0 := Function.Surjective.addCommMagma f hf mul; AddCommSemigroup.mk ⋯

@[reducible]

def Function.Surjective.commSemigroup {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₂] [CommSemigroup M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) : CommSemigroup M₂

A type endowed with * is a commutative semigroup, if it admits a surjective map that preserves * from a commutative semigroup. See note [reducible non-instances].

Equations

• Function.Surjective.commSemigroup f hf mul = let __spread.0 := Function.Surjective.commMagma f hf mul; CommSemigroup.mk ⋯

@[reducible]

def Function.Surjective.addZeroClass {M₁ : Type u_1} {M₂ : Type u_2} [Add M₂] [Zero M₂] [AddZeroClass M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) : AddZeroClass M₂

A type endowed with 0 and + is an AddZeroClass, if it admits a surjective map that preserves 0 and + to an AddZeroClass.

Equations

• Function.Surjective.addZeroClass f hf one mul = let __src := inst✝; let __src_1 := inst✝¹; AddZeroClass.mk ⋯ ⋯

theorem Function.Surjective.addZeroClass.proof_2 {M₁ : Type u_2} {M₂ : Type u_1} [Add M₂] [Zero M₂] [AddZeroClass M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (y : M₂) : y + 0 = y

theorem Function.Surjective.addZeroClass.proof_1 {M₁ : Type u_2} {M₂ : Type u_1} [Add M₂] [Zero M₂] [AddZeroClass M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (y : M₂) : 0 + y = y

@[reducible]

def Function.Surjective.mulOneClass {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₂] [One M₂] [MulOneClass M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) : MulOneClass M₂

A type endowed with 1 and * is a MulOneClass, if it admits a surjective map that preserves 1 and * from a MulOneClass. See note [reducible non-instances].

Equations

• Function.Surjective.mulOneClass f hf one mul = let __src := inst✝; let __src_1 := inst✝¹; MulOneClass.mk ⋯ ⋯

@[reducible]

def Function.Surjective.addMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Add M₂] [Zero M₂] [SMul ℕ M₂] [AddMonoid M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) : AddMonoid M₂

A type endowed with 0 and + is an additive monoid, if it admits a surjective map that preserves 0 and + to an additive monoid. This version takes a custom nsmul as a [SMul ℕ M₂] argument.

Equations

• One or more equations did not get rendered due to their size.

theorem Function.Surjective.addMonoid.proof_2 {M₁ : Type u_2} {M₂ : Type u_1} [Add M₂] [SMul ℕ M₂] [AddMonoid M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (n : ℕ) (y : M₂) : (fun (n : ℕ) (x : M₂) => n • x) (n + 1) y = (fun (n : ℕ) (x : M₂) => n • x) n y + y

theorem Function.Surjective.addMonoid.proof_1 {M₁ : Type u_2} {M₂ : Type u_1} [Add M₂] [Zero M₂] [SMul ℕ M₂] [AddMonoid M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (y : M₂) : (fun (n : ℕ) (x : M₂) => n • x) 0 y = 0

@[reducible]

def Function.Surjective.monoid {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₂] [One M₂] [Pow M₂ ℕ] [Monoid M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) : Monoid M₂

A type endowed with 1 and * is a monoid, if it admits a surjective map that preserves 1 and * to a monoid. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Surjective.addMonoidWithOne {M₁ : Type u_1} {M₂ : Type u_3} [Zero M₂] [One M₂] [Add M₂] [SMul ℕ M₂] [NatCast M₂] [AddMonoidWithOne M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ (x y : M₁), f (x + y) = f x + f y) (nsmul : ∀ (n : ℕ) (x : M₁), f (n • x) = n • f x) (natCast : ∀ (n : ℕ), f ↑n = ↑n) : AddMonoidWithOne M₂

A type endowed with 0, 1 and + is an additive monoid with one, if it admits a surjective map that preserves 0, 1 and * from an additive monoid with one. See note [reducible non-instances].

Equations

• Function.Surjective.addMonoidWithOne f hf zero one add nsmul natCast = let __src := Function.Surjective.addMonoid f hf zero add ⋯; AddMonoidWithOne.mk ⋯ ⋯

@[reducible]

def Function.Surjective.addCommMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Add M₂] [Zero M₂] [SMul ℕ M₂] [AddCommMonoid M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) : AddCommMonoid M₂

A type endowed with 0 and + is an additive commutative monoid, if it admits a surjective map that preserves 0 and + to an additive commutative monoid.

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Surjective.commMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₂] [One M₂] [Pow M₂ ℕ] [CommMonoid M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) : CommMonoid M₂

A type endowed with 1 and * is a commutative monoid, if it admits a surjective map that preserves 1 and * from a commutative monoid. See note [reducible non-instances].

Equations

• Function.Surjective.commMonoid f hf one mul npow = let __src := Function.Surjective.commSemigroup f hf mul; let __src_1 := Function.Surjective.monoid f hf one mul npow; CommMonoid.mk ⋯

@[reducible]

def Function.Surjective.addCommMonoidWithOne {M₁ : Type u_1} {M₂ : Type u_3} [Zero M₂] [One M₂] [Add M₂] [SMul ℕ M₂] [NatCast M₂] [AddCommMonoidWithOne M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ (x y : M₁), f (x + y) = f x + f y) (nsmul : ∀ (n : ℕ) (x : M₁), f (n • x) = n • f x) (natCast : ∀ (n : ℕ), f ↑n = ↑n) : AddCommMonoidWithOne M₂

A type endowed with 0, 1 and + is an additive monoid with one, if it admits a surjective map that preserves 0, 1 and * from an additive monoid with one. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Surjective.involutiveNeg {M₁ : Type u_1} {M₂ : Type u_3} [Neg M₂] [InvolutiveNeg M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (inv : ∀ (x : M₁), f (-x) = -f x) : InvolutiveNeg M₂

A type has an involutive negation if it admits a surjective map that preserves - to a type which has an involutive negation.

Equations

• Function.Surjective.involutiveNeg f hf inv = InvolutiveNeg.mk ⋯

theorem Function.Surjective.involutiveNeg.proof_1 {M₁ : Type u_2} {M₂ : Type u_1} [Neg M₂] [InvolutiveNeg M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (inv : ∀ (x : M₁), f (-x) = -f x) (y : M₂) : - -y = y

@[reducible]

def Function.Surjective.involutiveInv {M₁ : Type u_1} {M₂ : Type u_3} [Inv M₂] [InvolutiveInv M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (inv : ∀ (x : M₁), f x⁻¹ = (f x)⁻¹) : InvolutiveInv M₂

A type has an involutive inversion if it admits a surjective map that preserves ⁻¹ to a type which has an involutive inversion. See note [reducible non-instances]

Equations

• Function.Surjective.involutiveInv f hf inv = InvolutiveInv.mk ⋯

@[reducible]

def Function.Surjective.subNegMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Add M₂] [Zero M₂] [SMul ℕ M₂] [Neg M₂] [Sub M₂] [SMul ℤ M₂] [SubNegMonoid M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) : SubNegMonoid M₂

A type endowed with 0, +, unary -, and binary - is a SubNegMonoid if it admits a surjective map that preserves 0, +, unary -, and binary - to a SubNegMonoid.

Equations

• One or more equations did not get rendered due to their size.

theorem Function.Surjective.subNegMonoid.proof_3 {M₁ : Type u_2} {M₂ : Type u_1} [Add M₂] [Zero M₂] [SMul ℕ M₂] [SMul ℤ M₂] [SubNegMonoid M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (n : ℕ) (y : M₂) : (fun (n : ℤ) (x : M₂) => n • x) (Int.ofNat (Nat.succ n)) y = (fun (n : ℤ) (x : M₂) => n • x) (Int.ofNat n) y + y

theorem Function.Surjective.subNegMonoid.proof_4 {M₁ : Type u_2} {M₂ : Type u_1} [Neg M₂] [SMul ℤ M₂] [SubNegMonoid M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (inv : ∀ (x : M₁), f (-x) = -f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (n : ℕ) (y : M₂) : (fun (n : ℤ) (x : M₂) => n • x) (Int.negSucc n) y = -(fun (n : ℤ) (x : M₂) => n • x) (↑(Nat.succ n)) y

theorem Function.Surjective.subNegMonoid.proof_2 {M₁ : Type u_2} {M₂ : Type u_1} [Add M₂] [Zero M₂] [SMul ℕ M₂] [SMul ℤ M₂] [SubNegMonoid M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (y : M₂) : (fun (n : ℤ) (x : M₂) => n • x) 0 y = 0

theorem Function.Surjective.subNegMonoid.proof_1 {M₁ : Type u_2} {M₂ : Type u_1} [Add M₂] [Zero M₂] [SMul ℕ M₂] [Neg M₂] [Sub M₂] [SubNegMonoid M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (y₁ : M₂) (y₂ : M₂) : y₁ - y₂ = y₁ + -y₂

@[reducible]

def Function.Surjective.divInvMonoid {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₂] [One M₂] [Pow M₂ ℕ] [Inv M₂] [Div M₂] [Pow M₂ ℤ] [DivInvMonoid M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (inv : ∀ (x : M₁), f x⁻¹ = (f x)⁻¹) (div : ∀ (x y : M₁), f (x / y) = f x / f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) (zpow : ∀ (x : M₁) (n : ℤ), f (x ^ n) = f x ^ n) : DivInvMonoid M₂

A type endowed with 1, *, ⁻¹, and / is a DivInvMonoid if it admits a surjective map that preserves 1, *, ⁻¹, and / to a DivInvMonoid. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

theorem Function.Surjective.addGroup.proof_1 {M₁ : Type u_2} {M₂ : Type u_1} [Add M₂] [Zero M₂] [SMul ℕ M₂] [Neg M₂] [Sub M₂] [SMul ℤ M₂] [AddGroup M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (y : M₂) : -y + y = 0

@[reducible]

def Function.Surjective.addGroup {M₁ : Type u_1} {M₂ : Type u_2} [Add M₂] [Zero M₂] [SMul ℕ M₂] [Neg M₂] [Sub M₂] [SMul ℤ M₂] [AddGroup M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) : AddGroup M₂

A type endowed with 0 and + is an additive group, if it admits a surjective map that preserves 0 and + to an additive group.

Equations

• Function.Surjective.addGroup f hf one mul inv div npow zpow = let __src := Function.Surjective.subNegMonoid f hf one mul inv div npow zpow; AddGroup.mk ⋯

@[reducible]

def Function.Surjective.group {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₂] [One M₂] [Pow M₂ ℕ] [Inv M₂] [Div M₂] [Pow M₂ ℤ] [Group M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (inv : ∀ (x : M₁), f x⁻¹ = (f x)⁻¹) (div : ∀ (x y : M₁), f (x / y) = f x / f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) (zpow : ∀ (x : M₁) (n : ℤ), f (x ^ n) = f x ^ n) : Group M₂

A type endowed with 1, * and ⁻¹ is a group, if it admits a surjective map that preserves 1, * and ⁻¹ to a group. See note [reducible non-instances].

Equations

• Function.Surjective.group f hf one mul inv div npow zpow = let __src := Function.Surjective.divInvMonoid f hf one mul inv div npow zpow; Group.mk ⋯

@[reducible]

def Function.Surjective.addGroupWithOne {M₁ : Type u_1} {M₂ : Type u_3} [Zero M₂] [One M₂] [Add M₂] [Neg M₂] [Sub M₂] [SMul ℕ M₂] [SMul ℤ M₂] [NatCast M₂] [IntCast M₂] [AddGroupWithOne M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ (x y : M₁), f (x + y) = f x + f y) (neg : ∀ (x : M₁), f (-x) = -f x) (sub : ∀ (x y : M₁), f (x - y) = f x - f y) (nsmul : ∀ (n : ℕ) (x : M₁), f (n • x) = n • f x) (zsmul : ∀ (n : ℤ) (x : M₁), f (n • x) = n • f x) (natCast : ∀ (n : ℕ), f ↑n = ↑n) (intCast : ∀ (n : ℤ), f ↑n = ↑n) : AddGroupWithOne M₂

A type endowed with 0, 1, + is an additive group with one, if it admits a surjective map that preserves 0, 1, and + to an additive group with one. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Surjective.addCommGroup {M₁ : Type u_1} {M₂ : Type u_2} [Add M₂] [Zero M₂] [SMul ℕ M₂] [Neg M₂] [Sub M₂] [SMul ℤ M₂] [AddCommGroup M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) : AddCommGroup M₂

A type endowed with 0 and + is an additive commutative group, if it admits a surjective map that preserves 0 and + to an additive commutative group.

Equations

• One or more equations did not get rendered due to their size.

theorem Function.Surjective.addCommGroup.proof_1 {M₁ : Type u_2} {M₂ : Type u_1} [Add M₂] [Zero M₂] [SMul ℕ M₂] [Neg M₂] [Sub M₂] [SMul ℤ M₂] [AddCommGroup M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (a : M₂) (b : M₂) : a - b = a + -b

theorem Function.Surjective.addCommGroup.proof_3 {M₁ : Type u_2} {M₂ : Type u_1} [Add M₂] [Zero M₂] [SMul ℕ M₂] [Neg M₂] [Sub M₂] [SMul ℤ M₂] [AddCommGroup M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (n : ℕ) (a : M₂) : SubNegMonoid.zsmul (Int.ofNat (Nat.succ n)) a = SubNegMonoid.zsmul (Int.ofNat n) a + a

theorem Function.Surjective.addCommGroup.proof_2 {M₁ : Type u_2} {M₂ : Type u_1} [Add M₂] [Zero M₂] [SMul ℕ M₂] [Neg M₂] [Sub M₂] [SMul ℤ M₂] [AddCommGroup M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (a : M₂) : SubNegMonoid.zsmul 0 a = 0

theorem Function.Surjective.addCommGroup.proof_4 {M₁ : Type u_2} {M₂ : Type u_1} [Add M₂] [Zero M₂] [SMul ℕ M₂] [Neg M₂] [Sub M₂] [SMul ℤ M₂] [AddCommGroup M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 0 = 0) (mul : ∀ (x y : M₁), f (x + y) = f x + f y) (inv : ∀ (x : M₁), f (-x) = -f x) (div : ∀ (x y : M₁), f (x - y) = f x - f y) (npow : ∀ (x : M₁) (n : ℕ), f (n • x) = n • f x) (zpow : ∀ (x : M₁) (n : ℤ), f (n • x) = n • f x) (n : ℕ) (a : M₂) : SubNegMonoid.zsmul (Int.negSucc n) a = -SubNegMonoid.zsmul (↑(Nat.succ n)) a

@[reducible]

def Function.Surjective.commGroup {M₁ : Type u_1} {M₂ : Type u_2} [Mul M₂] [One M₂] [Pow M₂ ℕ] [Inv M₂] [Div M₂] [Pow M₂ ℤ] [CommGroup M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (one : f 1 = 1) (mul : ∀ (x y : M₁), f (x * y) = f x * f y) (inv : ∀ (x : M₁), f x⁻¹ = (f x)⁻¹) (div : ∀ (x y : M₁), f (x / y) = f x / f y) (npow : ∀ (x : M₁) (n : ℕ), f (x ^ n) = f x ^ n) (zpow : ∀ (x : M₁) (n : ℤ), f (x ^ n) = f x ^ n) : CommGroup M₂

A type endowed with 1, *, ⁻¹, and / is a commutative group, if it admits a surjective map that preserves 1, *, ⁻¹, and / from a commutative group. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

@[reducible]

def Function.Surjective.addCommGroupWithOne {M₁ : Type u_1} {M₂ : Type u_3} [Zero M₂] [One M₂] [Add M₂] [Neg M₂] [Sub M₂] [SMul ℕ M₂] [SMul ℤ M₂] [NatCast M₂] [IntCast M₂] [AddCommGroupWithOne M₁] (f : M₁ → M₂) (hf : Function.Surjective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ (x y : M₁), f (x + y) = f x + f y) (neg : ∀ (x : M₁), f (-x) = -f x) (sub : ∀ (x y : M₁), f (x - y) = f x - f y) (nsmul : ∀ (n : ℕ) (x : M₁), f (n • x) = n • f x) (zsmul : ∀ (n : ℤ) (x : M₁), f (n • x) = n • f x) (natCast : ∀ (n : ℕ), f ↑n = ↑n) (intCast : ∀ (n : ℤ), f ↑n = ↑n) : AddCommGroupWithOne M₂

A type endowed with 0, 1, + is an additive commutative group with one, if it admits a surjective map that preserves 0, 1, and + to an additive commutative group with one. See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.