Martin, B. and Raimondi, F. and Chen, Taolue and Martin, J. (2017) The packing chromatic number of the infinite square lattice is between 13 and 15. Discrete Applied Mathematics 225 , pp. 136-142. ISSN 0166-218X.
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Abstract
Using a SAT-solver on top of a partial previously-known solution we improve the upper bound of the packing chromatic number of the infinite square lattice from 17 to 15. We discuss the merits of SAT-solving for this kind of problem as well as compare the performance of different encodings. Further, we improve the lower bound from 12 to 13 again using a SAT-solver, demonstrating the versatility of this technology for our approach.
Metadata
| Item Type: | Article |
|---|---|
| Keyword(s) / Subject(s): | Packing chromatic number, Broadcast chromatic number, Graph colouring, SAT solving |
| School: | Birkbeck Faculties and Schools > Faculty of Science > School of Computing and Mathematical Sciences |
| Depositing User: | Taolue Chen |
| Date Deposited: | 19 Sep 2017 14:44 |
| Last Modified: | 09 Aug 2023 12:42 |
| URI: | https://eprints.bbk.ac.uk/id/eprint/19652 |
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