fact: Definition is_mono := forall (P : {fpmod R}) (psi : 'Mor(P, M)), psi ** phi %= 0 -> psi %= 0.
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