fact: Definition id_subpcmMix_st := @subPCMMix_st U U _ (id_morph U) (id_morph U) idsubpcm_valid_psub (fun x => erefl) (fun x y z=>erefl) (fun x y=>y).
imports: Coq(ssreflect ssrbool ssrfun) mathcomp(eqtype fintype) pcm(options axioms prelude) pcm(pcm)