proposition: Lemma coprimepMl p q r: coprimep (q * r) p = (coprimep q p && coprimep r p).
proof: Proof. by rewrite ![coprimep _ p]coprimep_sym coprimepMr. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop ssralg poly)