proposition: Fact compN1op : (nu \; s_law) (-1) =1 -%R.
proof: Proof. by move=> v; rewrite /= rmorphN1 N1op. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div seq) mathcomp(choice fintype finfun bigop prime binomial)