数学前沿

To celebrate Ada Lovelace day, we've spoken to some of the brilliant women honoured at the International Congress of Mathematicians.

How do you adjust your approach when new information is coming in all the time? The answer lies with Bayes Theorem.

How do you adjust your approach when new information is coming in all the time? The answer lies with Bayes Theorem.

文章以作者团队开发的 Tsunami-HySEA 模型为主线，说明如何从球坐标下的浅层水方程出发，用有限体积格式、TVD-WAF 限制器和干湿处理来模拟海啸传播与漫滩，再借助多分辨率嵌套网格和 GPU 高性能计算，把理论模型转化为可在 Copernicus EMS 框架下运行的海岸危险性评估工具。文中特别强调，数据一致性与海岸线定义会直接影响漫滩模拟：把海底地形与陆地高程拼接成无缝的 topobathymetric 模型时，岸线附近的微小不一致就可能引起虚假的干湿变化。应用部分给出西班牙海岸的算例：大西洋最坏情景（由 Marquês de Pombal 与 Horseshoe 断层组成的复合震源）约 50–60 分钟到达、局部波高接近 8 米；地中海多个候选震源则可能在约 15 分钟内到达，但波幅较小。作者还介绍了四层嵌套网格（分辨率从 320 米细化到 5 米），以及基于最大淹没水深和淹没范围生成的疏散路线与垂直疏散产品（PEMAREA 平台）。读这篇长文时，可重点看数学表述如何与运行流程的各个环节对应起来。

第 1 页 A message from the president Photo by Jim Høyer, University of Copenhagen. It has been a very intense summer pe- riod for the EMS and the worldwide mathematical community in general. At the end of June, we had the EMS council meeting. The council is the gov- erning body of the EMS. The EMS’s activities are being reviewed, and the budget suggested by the Executive Committee for the next two years is approved. The most exciting item on the council this time was the election of Professor Helge Holden as the new president of the EMS for the 2027–2030 period. Congratulations to Helge and to

第 1 页 On Stefan Cohn-Vossen and his family Bernd Kawohl and Michael Weigel Many mathematicians know and appreciate the book “Geometry and the imagination” by Hilbert and Cohn-Vossen [15] . It was first published in German in 1932 and has been translated into many languages. In contrast to David Hilbert, the second author, Stefan Cohn-Vossen, is less well known. In an effort to find out more about him, we realized that his life and that of his family had been affected by many dramatic and historic events. 1 Stefan Cohn-Vossen Bernhard Arnold Stefan Cohn-Vossen was born on May 28, 1902,