fact: Definition optPCMMixin U := PCMMixin (@OptionPCM.joinC U) (@OptionPCM.joinA U) (@OptionPCM.unitL U) (@OptionPCM.validL U) (@OptionPCM.validU U).
imports: Coq(ssreflect ssrbool ssrfun) mathcomp(ssrnat eqtype seq bigop fintype finset) pcm(options axioms prelude seqperm pred seqext)