R440, Astronomy-Mathematics Building, NTU

**Invited Speakers:**

Po-Ning Chen (University of California, Riverside)

Mu-Tao Wang (Columbia University)

Ye-Kai Wang (National Cheng Kung University)

Shing-Tung Yau (Harvard University)

**Organizers:**

Chung-Jun Tsai (National Taiwan University)

Mao-Pei Tsui (National Taiwan University)

Mu-Tao Wang (Columbia University)

**Aim & Scope:**

Due to the equivalence principle and the lack of an absolute space, the understanding of this fundamental notion for gravitation has been subtle since Einstein's time. Arnowitt-Deser-Misner gave the well-defined definition for an asymptotically flat isolated system, while Bondi-Trautman gave the definition of mass after gravitational radiation. By 1970's, it was well-recognized that the positivity of these notions, which is intimately related to the stability of the system, lies in the foundation of the theory of general relativity. There was an intense period of study and the efforts culminated in the proof of the positive mass theorem by Schoen-Yau in 1980's (a different proof was given by Witten later). The subject has since undergone rapid developments. In particular, many new ideas and techniques from geometric analysis were applied and major progress has been achieved. The talks of this workshop will provide an overview of related topics and also make connections to the summer course "The mathematics of gravitational radiations" in the following week.

Conference website:https://sites.google.com/view/massgr19

Registration:https://bit.ly/2Nom3CG (Please do **NOT** register if you only plan to attend the distinguished lecture.)

**Agenda (download, click here):**

1.9:30-10:30 Shing-Tung Yau 丘成桐(Harvard/Tsinghua): The origins of classical theory of general relativity and gauge theory

Distinguished Lecture @R639 Lecture Room , AS

2.10:30-11:00 break

3.11:00-12:00 Ye-Kai Wang 王業凱(NCKU): A review of positive mass theorems

4.12:00-14:00 Lunch break

5.14:00-15:00 Po-Ning Chen 陳泊寧(UC Riverside): A review of quasilocal mass in general relativity

6.15:00-15:30 break

7.15:30-16:30 Mu-Tao Wang 王慕道(Columbia): Mass and gravitational radiation

Title & Abstract download: (please click here)

**Contact:** Peggy Lee (peggylee@ncts.tw)

Poster: events_1_2271907085140147864.jpg