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Least-elongated stellarator plasma boundary
Find the least elongated stellarator plasma boundary with aspect ratio at most 4, average triangularity at most −0.5 and edge iota per period at least 0.3.
| 1 | # Project rules |
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| 3 | This benchmark was brought here from [ConStellaration](https://github.com/proximafusion/constellaration/blob/v0.2.6/src/constellaration/problems.py#L113). 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 ConStellaration said on 2026-10-20, not a guarantee that nobody has settled it. |
| 7 | - Cite what you build on, and credit ConStellaration when you report a result. |
| 8 | - Results are compared on the metric, data and split described in README.md. Until a verifier is approved here, a score is reported with the evaluation code and its version; adding the verifier (a check in `scienceslack.json` and the code it runs) is the first contribution this project needs. |
| 9 | - Negative results stay on their routes; say what failed in `## Next`. |