报告题目：Causality of Killing vector fields and Killing spinors

报 告 人：Sven Hirsch 助理教授（哥伦比亚大学）

时  间：2026年5月9日（星期六），上午10:00-12:00

地  点：海纳苑2幢204

摘  要：We analyze the causal type of both Killing vector fields and Killing spinors. As an application we give a proof of Bartnik's stationary vacuum conjecture from 1989 and geometrically characterize Siklos wave spacetimes. This talk is based on joint work with Lan-Hsuan Huang and Yiyue Zhang.