Speaker
Prof.
Shing-Tung Yau
(Harvard-USA)
Description
The notion of angular momentum in general relativity has been a subtle issue since the 1960's, due to the discovery of ``supertranslation ambiguity": the angular momentums recorded by two distant observers of the same system may not be the same. In this talk, I shall show how mathematical theory identifies a correction term, and leads to a new definition of angular momentum that is free of any supertranslation ambiguity. This is based on joint work with Po-Ning Chen, Jordan Keller, Mu-Tao Wang, and Ye-Kai Wang
