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A characterization of level planar graphs |
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| Authors: | Patrick Healy Ago Kuusik Sebastian Leipert |
| Institution: | a Department of Computer Science and Information Systems, University of Limerick, Limerick, Ireland b Department of Computer Science and Software Engineering, University of Newcastle, Callaghan, NSW 2308, Australia c Stiftung caesar, Bonn, Germany |
| Abstract: | We present a characterization of level planar graphs in terms of minimal forbidden subgraphs called minimal level non-planar (MLNP) subgraph patterns. We show that an MLNP subgraph pattern is completely characterized by either a tree, a level non-planar cycle or a level planar cycle with certain path augmentations. |
| Keywords: | Author Keywords: Level graphs Minimal non-planarity Maximum level planar subgraph |
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