fact: Definition iso_of_isom phi psi (isom : @isomorphisms R M N phi psi) := Isomorphism (@introTF _ _ true (isoP phi) (ex_intro _ psi isom)).
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