Theorems · Theorem · combinatorics

Multiset.filter_map

∀ {α : Type u_1} {β : Type v} (p : α → Prop) [inst : DecidablePred p] (f : β → α) (s : Multiset β),
  Multiset.filter p (Multiset.map f s) = Multiset.map f (Multiset.filter (p ∘ f) s)

Defined in

Mathlib.Data.Multiset.Filter

Cited by

4 results in Mathlib

Foundations

Depth 15 from the axioms · uses propext, Quot.sound

Assumes

DecidablePred