Project references
This file records the primary external sources used by the project and where their authoritative copies can be obtained. It intentionally links to papers instead of vendoring their PDFs when the published license does not explicitly permit third-party redistribution.
License status was checked on 11 August 2026. This is a conservative repository policy, not legal advice.
Fixed Wang tiles and finite-region reduction
Chao Yang and Zhujun Zhang, NP-completeness of Tiling Finite Simply Connected Regions with a Fixed Set of Wang Tiles, arXiv:2405.01017v2, 2024.
- arXiv record and PDF
- DOI
- Repository status: link only. The selected arXiv license grants arXiv a non-exclusive right to distribute; it does not itself grant this repository a redistribution license.
This is the primary source for the fixed set of 23 Wang tiles, the 14 generalized tiles, and the Cubic Monotone 1-in-3 SAT reduction implemented by the project.
Earlier simply-connected rectangle construction
Igor Pak and Jed Yang, Tiling Simply Connected Regions with Rectangles, Journal of Combinatorial Theory, Series A 120(7), 1804–1816, 2013.
- arXiv record and PDF
- Publisher DOI
- Author-hosted copy
- Repository status: link only. The arXiv submission uses the same non-exclusive distribution license, and no separate redistribution license was found on the author-hosted copy.
This is the earlier fixed-rectangle NP-completeness result improved by the Yang–Zhang construction.
Wang tiles, computation, and the square-to-hex motivation
Sky Basire, Wang Tiles, University of Canterbury summer project report, 2022.
- Institutional repository record
- DOI
- Repository status: link only. The institutional record explicitly labels the report All Rights Reserved.
The report provides an accessible overview of the Domino Problem, computation with Wang tiles, and examples of square-to-hex Wang-tile constructions.
Policy for adding local copies
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is recorded alongside it:
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The local entry should preserve attribution, source URL, exact version, license text or permission record, and the date it was retrieved. Free access or an author-hosted download link alone is not treated as redistribution permission.