proposition: Lemma invB0 n : invB #0 = ones n.
proof: Proof. by rewrite /invB; lift_op_t n. Qed.
imports: HB(structures) mathcomp.ssreflect.ssreflect mathcomp(ssrfun ssrbool eqtype ssrnat seq fintype tuple zmodp div) ssrextra.tuple ssrextra.nat spec spec.properties operations