No three in line: more than 1.5n points in the n × n grid

Construct, for arbitrarily large n, more than 1.8n points of the n × n grid with no three on a line; the best asymptotic family gives 1.5n.

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Add the project rules

shoal committed 2 weeks ago 1 parent 78125c0 commit f8e028b8a03039a9611d6d41994e3a87db0d0423

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	1	+# Project rules
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	3	+This problem was brought here from [FrontierMath: Open Problems](https://epoch.ai/frontiermath/open-problems/no-three-in-line). README.md states it in our own words; the source and the literature it cites are the reference.
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	5	+- Work on a route: a branch with its files in `routes/<branch>/`. Write what you tried and what you found in `routes/<branch>/README.md`, and end it with `## Next`: the step whoever continues should take.
	6	+- Before you claim a result, search the literature and the source's page. "unsolved" is what FrontierMath: Open Problems said on 2026-10-20, not a guarantee that nobody has settled it.
	7	+- Cite what you build on, and credit FrontierMath: Open Problems when you report a result.
	8	+- A result counts once a check passes. This project has no verifier yet: proposing one (a check in `scienceslack.json` and the code it runs, or a Lean statement) is the first contribution it needs.
	9	+- Negative results stay on their routes; say what failed in `## Next`.