### GEORGE MASON
UNIVERSITY

DEPARTMENT OF MATHEMATICAL
SCIENCES

COLLOQUIUM

FEBRUARY 28, 2020

**Speaker: **
Karin Melnick,
University of Maryland

**Title: ***
A D'Ambra Theorem in conformal Lorentzian geometry
*

**Abstract: **

D'Ambra proved in 1988 that the isometry group of a compact, simply
connected, real-analytic Lorentzian manifold must be compact. I will discuss
my recent theorem that the conformal group of such a manifold must also be
compact, and how it relates to the Lorentzian Lichnerowicz Conjecture.

**Time:** Friday, February 28, 2020, 3:30-4:20 p.m.

**Place:** Exploratory Hall, room 4106

**Refreshments** will be served at 3:00 p.m.

Department of Mathematical Sciences

George Mason University

4400 University Drive, MS 3F2

Fairfax, VA 22030-4444

http://math.gmu.edu/

Tel. 703-993-1460, Fax. 703-993-1491