I didn't get Hexcodle #485 :( Score: 55%
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"Tiling with Three Polygons is Undecidable"
Erik D. Demaine; Stefan Langerman 17 Sep 2024
Abstract
We prove that the following problem is co-RE-complete and thus undecidable: given three simple polygons, is there a tiling of the plane where every tile is an isometry of one of the three polygons (either allowing or forbidding reflections)? This result improves on the best previous construction which requires five polygons.
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It remains open whether tiling …
After discussing the possibility for several months, European nations are finally forming a unified barrier of insurance checks and enforcement around areas where Russia's shadow fleet operate... a very important development, as it either will deprive them from the ability to keep evading sanctions, or significantly increase the costs and risks of doing so.
Big ramifications. This could have a major impact on Russia's recent long term oil delivery deal with India, i.e.
[ September 4, 2025 - September 6, 2025] Conference or similar: The British Society for the Philosophy of Religion, 2025 Biennial Conference: Creativity and Creation https://philevents.org/event/show/122346