皮奥特·赫鲁谢尔 , 普斯卡尔·蒙达尔 , 赵博文

普斯卡尔·蒙达尔

2026年11月17日 16:30 至 17:30

Tsinghua-Jingzhai-105

Zoom 712 322 9571 (BIMSA)

We construct nontrapped characteristic exteriors for the spherically symmetric Einstein–Yang–Mills system with gauge group SU (2) in the purely magnetic setting. The incoming Yang–Mills potential varies in an open neighborhood of a discretely self-similar reference profile. The Kretschmann scalar diverges at the endpoint, and outgoing radial null rays from regular points of arbitrarily large curvature reach a smooth null infinity. The generators of this boundary have finite future affine length. This answers a question raised by S-T Yau earlier and in joint work with N. Athanasiou and Prof. Yau.

Puskar Mondal is currently an assistant professor in BIMSA. He's been a fellow and lecturer at Harvard CMSA of Mathematics (his mentor is Prof. Shing-Tung Yau), and was a Ph.D. student at Yale University, under the supervision of Prof. Vincent Moncrief.