proposition: Lemma ltz_mod m d : d != 0 -> (m %% d)%Z < `|d|.
proof: Proof. by rewrite -absz_gt0 -modz_abs => d_gt0; apply: ltz_pmod. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq path) mathcomp(div choice fintype tuple finfun bigop prime order) mathcomp(ssralg poly ssrnum ssrint archimedean rat matrix) mathcomp(polydiv perm zmodp mxalgebra vector)