fact: Variables (K : ordType) (C : pred K) (Ua : union_map_class C aT) (Ur : union_map_class C rT).
imports: Coq(ssreflect ssrbool ssrfun) mathcomp(ssrnat eqtype seq path bigop) pcm(options prelude finmap seqperm pred seqext) pcm(pcm morphism)