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obstruction_set (241B)

      1 # Obstruction set
      2 
      3 From [chlebikova2002structure]: given a [minor_closed] [graph_class] H, the
      4 *obstruction set* is the set of [graphs] in the [complement] of H that are [minimal] for the [minor_order]
      5 
      6 Up: [obstruction_treewidth_pathwidth]