Clique-Width of Point Configurations
| Autoři | |
|---|---|
| Rok publikování | 2023 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | Journal of Combinatorial Theory, Ser B |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | |
| Doi | https://doi.org/10.1016/j.jctb.2021.09.001 |
| Klíčová slova | point configuration; order type; fixed-parameter tractability; relational structure; clique-width |
| Popis | While structural width parameters (of the input) belong to the standard toolbox of graph algorithms, it is not the usual case in computational geometry. As a case study we propose a natural extension of the structural graph parameter of clique-width to geometric point configurations represented by their order type. We study basic properties of this clique-width notion, and show that it is aligned with the general concept of clique-width of relational structures by Blumensath and Courcelle (2006). We also relate the new notion to monadic second-order logic of point configurations. As an application, we provide several linear FPT time algorithms for geometric point problems which are NP-hard in general, in the special case that the input point set is of bounded clique-width and the clique-width expression is also given. |
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