Science & math
Lean 4 disproof of the Köthe conjecture
In an Epoch AI eval, a pre-release GPT-6 Astra autonomously wrote a Lean 4 counterexample. Challenge/Solution, Comparator config, and CI are in the repo.
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Science & math / GPT-6 Astra
比较弹簧沿上行扶梯持续翻滚的物理动画
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要求无库 Canvas 实现弹簧在上行扶梯循环翻滚，并有 drop/reset 按钮。 作者报告 Astra 速度与额度较优但有弹簧自穿透，Fable视觉更真实且耗尽5小时窗口并报错。 单次主观对照；物理自穿透为作者观察，未复现或测量。
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