At the Lean FRO, Kim Morrison, a Senior Research Software Engineer, recently ran an experiment that went well beyond our expectations. An AI agent converted zlib, a widely used C compression library embedded in countless systems, to Lean, with minimal human guidance. No special tooling was built. It was Claude, a general-purpose AI, with no special training for theorem proving, out of the box. The workflow had four steps. First, the AI produced a clean, readable Lean implementation of the zlib compression format, including the DEFLATE algorithm at its core. Second, the Lean version passed the library’s existing test suite, confirming behavioral equivalence. Third, key properties were stated and proved, not as tests, but as mathematical theorems. The capstone theorem:
Некоторые европейские страны отказались бесплатно вызволять своих граждан с охваченного военным конфликтом Ближнего Востока — билеты обходятся пассажирам от 350 до 2,3 тысячи евро (от 32 до 210 тысяч рублей). Об этом сообщает Ассоциация туроператоров России (АТОР).
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Фото: Рамиль Ситдиков / РИА Новости
高盛分析师团队的核心逻辑是：内存芯片成本大幅上涨导致智能手机BOM成本显著垫高，对于价格敏感的入门级市场，这几乎是毁灭性打击。在新兴市场，消费者对价格极为敏感。一旦售价低于200美元的入门机型因成本压力而涨价，需求往往会迅速消失。高盛预测，2025至2027年间，全球入门级手机销量将以年复合增长率-4%持续萎缩，其市占率将从2024年的44%下滑至2027年的40%。