proposition: Lemma w_seq_ge0 k : 0 <= w_seq k.
proof: Proof. exact/ltW/w_seq_gt0. Qed.
imports: ZArith mathcomp(all_ssreflect all_algebra all_field) extra_mathcomp tactics binomialz floor arithmetics posnum rat_of_Z hanson_elem_arith hanson_elem_analysis