proposition: Lemma In_omapv (a : V -> option V') k v w (f : U) : (k, w) \In f -> a w = Some v -> (k, v) \In (omapv a f : U').
proof: Proof. by apply: In_omap. Qed.
imports: Coq(ssreflect ssrbool ssrfun) mathcomp(ssrnat eqtype seq path bigop) pcm(options prelude finmap seqperm pred seqext) pcm(pcm morphism)