Фото: Matt Crossick / WWD via Getty Images
Lean is backed by Mathlib, the largest coherent body of formalized mathematics ever created: over 200,000 formalized theorems and 750 contributors. Five Fields medalists engage with Lean. The same platform serves mathematicians formalizing theorems and engineers verifying production systems. ACM SIGPLAN recognized this convergence with its 2025 Programming Languages Software Award: “Lean has become the de facto choice for AI-based systems of mathematical reasoning.”
，更多细节参见体育直播
半个多世纪前，习近平同志来到陕西延川梁家河插队，与乡亲们同吃同住同劳动。七载春秋，当他离开时，已经有着坚定的人生目标，充满自信。他后来深情写道：“作为一个人民公仆，陕北高原是我的根，因为这里培养出了我不变的信念：要为人民做实事！”
FT Videos & Podcasts