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Characterising Chordal Contact \(B_0\)-VPG Graphs

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Part of the Lecture Notes in Computer Science book series (LNTCS,volume 10856)


A graph G is a \(B_0\)-VPG graph if it is the vertex intersection graph of horizontal and vertical paths on a grid. A graph G is a contact \(B_0\)-VPG graph if the vertices can be represented by interiorly disjoint horizontal or vertical paths on a grid and two vertices are adjacent if and only if the corresponding paths touch. In this paper, we present a minimal forbidden induced subgraph characterisation of contact \(B_0\)-VPG graphs within the class of chordal graphs and provide a polynomial-time algorithm for recognising these graphs.


  • Vertex intersection graphs
  • Contact \(B_0\)-VPG graphs
  • Forbidden induced subgraphs
  • Chordal graphs
  • Polynomial-time algorithm

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Correspondence to María Pía Mazzoleni .

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Bonomo, F., Mazzoleni, M.P., Rean, M.L., Ries, B. (2018). Characterising Chordal Contact \(B_0\)-VPG Graphs. In: Lee, J., Rinaldi, G., Mahjoub, A. (eds) Combinatorial Optimization. ISCO 2018. Lecture Notes in Computer Science(), vol 10856. Springer, Cham.

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