Mu-Tao Wang (Columbia University)

Title: On an invariant notion of angular momentum at null infinity

Abstract: We extend the earlier work of Chen-Wang-Yau and Keller-Wang-Yau to define total angular momentum of an asymptotically flat null hypersurface. This induces an angular momentum definition at any section of null infinity. We prove that this definition satisfies several invariant properties that include the BMS invariance.

Jose L....