proposition: Lemma umallPtUn k v f : P k v -> um_all f -> um_all (pts k v \+ f).
proof: Proof. by move/(umallPt (k:=k)); apply: umallUn. Qed.
imports: Coq(ssreflect ssrbool ssrfun) mathcomp(ssrnat eqtype seq path bigop) pcm(options prelude finmap seqperm pred seqext) pcm(pcm morphism)