'A 59-year-old conjecture in fusion physics just fell'
0ximai @0x_impai · x · 2026-09-24 · ★★★ · archived
Viral (~744k views) summary of the two Grad's-conjecture papers, including that two of the three families were found with GPT-6 Astra.
Summary
Summarises Grad's 1967 conjecture and the two September 2026 preprints with three families of counterexamples, two of them found with GPT-6 Astra, and calls it "huge for stellarators".
Archived text
A 59-year-old conjecture in fusion physics just fell.
Harold Grad (1967): smooth 3D plasma equilibria can't exist unless pressure is constant or there's symmetry.
This week: 3 families of counterexamples. 2 independent papers, posted a day apart. Two found with GPT-6 Astra.
Huge for stellarators.
Media: https://video.twimg.com/tweet_video/HS_t0mNbYAE_p4Z.mp4
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Archived 2026-09-29 via fxtwitter (unofficial).
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