On Colourability of Polygon Visibility Graphs
Autoři | |
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Rok publikování | 2024 |
Druh | Článek v odborném periodiku |
Časopis / Zdroj | EUROPEAN JOURNAL OF COMBINATORICS |
Fakulta / Pracoviště MU | |
Citace | |
www | arXiv preprint |
Doi | http://dx.doi.org/10.1016/j.ejc.2023.103820 |
Klíčová slova | polygon visibility graph; graph coloring; NP-completeness |
Popis | We study the problem of colouring visibility graphs of polygons. In particular, for visibility graphs of simple polygons, we provide a polynomial algorithm for 4-colouring, and prove that the 5-colourability question is already NP-complete for them. For visibility graphs of polygons with holes, we prove that the 4-colourability question is NP-complete. |
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