proposition: Lemma card_border_ports (h : hemi_comp_graph) : (#|border h| <= #|ports h|)%nat.
proof: Proof. by apply subset_leq_card, border_p. Qed.
imports: mathcomp(all_ssreflect ssralg fingroup zmodp poly ssrnum) mathcomp(matrix perm) ssr_ext ssralg_ext fdist subgraph_partition tanner