fact: Definition step_nodes : hemi_comp_graph port := let n := nodes c in if step_trivIset && step_cond then Build_hemi_comp_graph (part_p n) (step_border n start_port) else n.
imports: mathcomp(all_ssreflect ssralg fingroup zmodp poly ssrnum) mathcomp(matrix perm) ssr_ext ssralg_ext fdist subgraph_partition tanner