fact: Record isomorphism_of := Isomorphism { morphism_of_iso :> 'Mor(M, N); _ : isom morphism_of_iso }.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div seq path) mathcomp(ssralg fintype perm choice matrix bigop zmodp mxalgebra poly) ssrcomplements stronglydiscrete coherent edr