fact: Definition tree'_of_trace (l : nat) (pn : {set port}) seqs : tree l.+1.*2 kv := Node [seq tree_of_trace (negk kv) p seqs | p in pn].
imports: mathcomp(all_ssreflect ssralg fingroup zmodp poly ssrnum) mathcomp(matrix perm) ssr_ext ssralg_ext fdist subgraph_partition tanner