Theorems · Theorem · combinatorics

Multiset.map_map

∀ {α : Type u_1} {β : Type v} {γ : Type u_2} (g : β → γ) (f : α → β) (s : Multiset α),
  Multiset.map g (Multiset.map f s) = Multiset.map (g ∘ f) s

Defined in

Mathlib.Data.Multiset.MapFold

Cited by

151 results in Mathlib

Foundations

Depth 13 from the axioms, rests on 43 definitions · uses propext, Quot.sound