proposition: Lemma lcmrCA a b c : lcmr a (lcmr b c) %= lcmr b (lcmr a c).
proof: Proof. rewrite (eqd_trans (lcmrA _ _ _)) //. by rewrite (eqd_trans (eqd_lcmr _ (lcmrC _ _))) // eqd_sym lcmrA. Qed.
imports: HB(structures) Coq(ssreflect ssrfun ssrbool Arith.Wf_nat) mathcomp(eqtype ssrnat div seq path) mathcomp(ssralg fintype perm tuple choice generic_quotient) mathcomp(matrix bigop zmodp mxalgebra poly) stronglydiscrete