Theorems · Theorem · combinatorics

IsMulFreimanIso.invFunOn

∀ {α : Type u_2} {β : Type u_3} [inst : CommMonoid α] [inst_1 : CommMonoid β] {A : Set α} {B : Set β} {f : α → β}
  {n : ℕ}, IsMulFreimanIso n A B f → IsMulFreimanIso n B A (Function.invFunOn f A)

If f is a multiplicative Freiman isomorphism from A to B, then f.invFunOn A is a multiplicative Freiman isomorphism from B to A.

Defined in

Mathlib.Combinatorics.Additive.FreimanHom

Cited by

2 results in Mathlib

Foundations

Depth 18 from the axioms · uses propext, Classical.choice, Quot.sound

Assumes

CommMonoidCommMonoid