proposition: Lemma path_filter (A : ordType) (s : seq A) (p : pred A) x : path ord x s -> path ord x (filter p s).
proof: Proof. exact/path_filter/trans. Qed.
imports: mathcomp(ssreflect ssrfun ssrnat div ssrbool seq) LemmaOverloading(prelude finmap ordtype) mathcomp(path eqtype) Eqdep