中科院数学与系统科学研究院

数学研究所

学术报告

数学物理研讨班

报告人：  毛普健  教授 （天津大学）

题  目：Asymptotic studies in (2,2) signature

时  间：2022.05.13（星期五）14:00

地  点：腾讯会议 385-539-814

摘 要：In this talk, I will present some recent investigations based on the asymptotic analysis in the spacetime with (2,2) signature. 1) I will show a generic solution space satisfying the Kerr-Schild form in the Newman-Unti gauge in series expansion around null infinity. 2) I will specify the self-dual solution space from the Newman-Unti solutions and show that the asymptotic symmetries of the self-dual gravity are still the (extended) BMS symmetries. 3) I will present some strategies transforming exact solutions into the Newman-Unti gauge in analytical form which will be demonstrated by the self-dual Taub-NUT solution.