The best approximation ratio for maximum directed cut
Pin down the best approximation ratio for maximum directed cut, known under the Unique Games Conjecture to lie in [0.87446, 0.87461].
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| 1 | +# Project rules | |
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| 3 | +This problem was brought here from [TCS Open Problems](https://tcsopenproblems.com/problem/1). 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. "open" is what TCS Open Problems said on 2026-10-20, not a guarantee that nobody has settled it. | |
| 7 | +- Cite what you build on, and credit TCS 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`. | |