The Spacetime Positive Mass Theorem with Multiple Time Dimensions

Time：Tues., 16:30-17:30, April 7, 2026

Venue：A3-3-201, BIMSA Zoom: 712 322 9571 Password: BIMSA

Speaker：Yiyue Zhang

BIMSA General Relativity Seminar

Organizers：

Piotr Chrusciel, Puskar Mondal, Bowen Zhao

Speaker：

Yiyue Zhang ( 张一岳 , BIMSA )

Time：

Tues., 16:30-17:30,

April 7, 2026

Venue：

A3-3-201, BIMSA

Zoom: 712 322 9571

Password: BIMSA

Title：

The Spacetime Positive Mass Theorem with Multiple Time Dimensions

Abstract:

We generalize the spacetime positive mass theorem to include multiple time dimensions. Equality in this energy inequality implies a foliation by flat submanifolds of a generalized initial data set. Moreover, under an additional umbilicity assumption, we find that the initial data set isometrically embeds into a generalized pp-wave.

DATEApril 6, 2026

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