proposition: Lemma dvdr_mem_lcms (l : seq R) x : x \in l -> x %| lcmsr l.
proof: Proof. by move=> hx; move: (dvdrr (lcmsr l)); rewrite dvdr_lcms; move/allP; apply. 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