proposition: Lemma rangePtUnK k v f : valid (pts k v \+ f) -> all (ord k) (dom f) -> range (pts k v \+ f) = v :: range f.
proof: Proof. by move=>W H; rewrite /range assocsPtUn. Qed.
imports: Coq(ssreflect ssrbool ssrfun) mathcomp(ssrnat eqtype seq path bigop) pcm(options prelude finmap seqperm pred seqext) pcm(pcm morphism)