proposition: Lemma int_num1 : 1 \is a int_num.
proof: Proof. by rewrite intrE nat_num1. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)