The source confirmed that a delegation of Hamas leaders, headed by Khalil Al-Hayya, arrived in Egypt to consult with Egyptian officials on ceasefire negotiations in Gaza, emphasizing that the visit ...

2025 年 2 月，Hannah Cairo 在预印本平台 arxiv 上发表了一篇论文，解决了有 40 年历史的 Mizohata-Takeuchi 猜想，她年仅 17 岁，主要依靠自学，一时间震惊了数学界。Cairo ...

几个月前，美国加利福尼亚大学伯克利分校（UC Berkeley）数学系的助理教授张瑞祥在给研究生开设的高阶数学课堂上，把一道调和分析领域中的著名问题（简化版）当成家庭作业，布置给了学生。张瑞祥本意是打算用这道题给学生热身，引导他们由此接触一些高阶技巧 ...

The Cairo Declaration cemented China’s status as one of the four Allied Great Powers, and affirmed the fact that Taiwan belongs to China as a matter of international law, thus providing a legal ...