proposition: Lemma mono (phi : 'Mono(M,N)) : is_mono phi.
proof: Proof. exact/monoP. Qed.
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