proposition: Lemma list_of_numK: cancel list_of_num num_of_list.
proof: Proof. by case => // p /=; rewrite -{2} (list_of_posK p);case: p. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq choice fintype order bigop ssralg) mathcomp(div ssrnum ssrint rat prime path binomial) mathcomp(tuple finset) gaia(fibm)