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graph_pk_free (578B)


      1 # P_k-free graph
      2 
      3 An [undirected_graph] is *P_k-free* if it does not have an [induced_subgraph] which is [graph_isomorphic] to a [path] on k [vertices]
      4 
      5 - P_2-free means no [edge] at all, so [empty_graph], or [independent_set]
      6 - P_3-free means every [connected_component] is a [clique]
      7   - https://math.stackexchange.com/questions/3564039/describe-all-graphs-that-do-not-contain-p-3-as-an-induced-subgraph
      8 - [P4_free_graphs] are precisely the [cographs]
      9 - [P5_free_graphs]
     10 
     11 Up: [graph_family], [graph_h_free]
     12 
     13 Aliases: PK free graph, PK free graphs
     14 
     15 See also: [forbidden_minor]