## Distinguished Lecture Series

Every year, the Distinguished Lecture Series (DLS) brings two to four eminent mathematicians to UCLA for a week or more to give a lecture series on their field, and to meet with faculty and graduate students.

The first lecture of each series is aimed at a general mathematical audience, and offers a rare opportunity to see the state of an area of mathematics from the perspective of one of its leaders. The remaining lectures in the series are usually more advanced, concerning recent developments in the area.

*Previous speakers of the DLS include:* Peter Sarnak, Peter Schneider, Zhenghan Wang, Pierre Colmez, Etienne Ghys, Goro Shimura, Jean Bellissard, Andrei Suslin, Pierre Deligne, Michael Harris, Alexander Lubotzky, Shing-Tau Yau, Hillel Furstenberg, Robert R. Langlands, Clifford Taubes, Louis Nirenberg, Oded Schramm, Louis Nirenberg, I.M. Singer, Jesper Lutzen, L.H. Eliasson, Raoul Bott, Dennis Gaitsgory, Gilles Pisier, Gregg Zuckerman, Freydoon Shahidi, Alain Connes, Jöran Friberg, David Mumford, Sir Michael Atiyah, Jean-Michel Bismut, Jean-Pierre Serre, G. Tian, N. Sibony, C. Deninger, Peter Lax, and Nikolai Reshetikhin, Horng-Tzer Yau, Ken Ono, Leonid Polterovich, Barry Mazur, Grigori Margulis, Mario Bonk, Avi Wigderson, John Coates, Charles Fefferman, C. David Levermore, Shouwu Zhang.

**The DLS is currently supported by the Larry M. Wiener fund.**

## Past Lectures

University of Sydney Visit: 04/30/2019 to 05/02/2019 |
U. Bonn and Max Planck Institute Visit: 03/12/2019 to 03/14/2019 |
Harvard University Visit: 10/16/2018 to 10/18/2018 |

Princeton University Visit: 06/06/2018 to 06/08/2018 |
University of Chicago Visit: 05/22/2018 to 05/24/2018 |
MIT Visit: 05/08/2018 to 05/10/2018 |

University of Sydney Visit: 05/30/2017 to 06/01/2017 |
College de France Visit: 05/09/2017 to 05/11/2017 |
Princeton University Visit: 04/04/2017 to 04/06/2017 |

Massachusetts Institute of Technology Visit: 01/24/2017 to 01/26/2017 |
Stanford University Visit: 11/14/2016 to 11/18/2016 |
Columbia University Visit: 05/17/2016 to 05/19/2016 |

Harvard University Visit: 04/25/2016 to 04/28/2016 |
Princeton University Visit: 05/19/2015 to 05/21/2015 |
Columbia University Visit: 02/17/2015 to 02/19/2015 |

Microsoft Research Visit: 11/03/2014 to 11/06/2014 |
Cambridge University Visit: 10/04/2014 to 10/10/2014 |
Duke University / UC Berkeley Visit: 05/19/2014 to 05/23/2014 |

IAS, Princeton Visit: 10/30/2013 to 11/06/2013 |
Texas A&M Visit: 10/22/2013 to 10/26/2013 |
Eötvös Loránd University Visit: 05/28/2013 to 05/30/2013 |

Rheinische Friedrich-Wilhelms-Universität Bonn Visit: 05/07/2013 to 05/09/2013 |
University of Strasbourg Visit: 04/03/2013 to 04/20/2013 |
Massachusetts Institute of Technology Visit: 01/24/2012 to 01/26/2012 |

Hebrew University Visit: 04/26/2011 to 04/28/2011 |

## Upcoming Lectures

### Richard Schoen

#### UC Irvine

**Visit:**

**Lectures:**

Overall title: “Geometric aspects of the Einstein equations”

**11/5: Lecture 1. “The geometry of spacetime”**

Abstract: This lecture will give an introduction to the Einstein equations and their initial value formulation. We will focus especially on geometric conditions which are implied by the equations, and we will introduce the idea of gravitational energy and mass.

**11/6: Lecture 2: “The general positive mass theorem”**

Abstract: This lecture will discuss the ADM mass and its positivity proofs. The original theorem was for four dimensional spacetimes, but there is also a natural version in higher dimensions which is important for mathematical applications as well as in physics arising from string theory. There are some subtle issues in the general theorem which we will discuss.

**11/7: Lecture 3: The problem of quasi-local mass in general relativity”**

Abstract: There is no notion of mass density for the gravitational field, so the problem of ascribing a reasonable definition of mass or energy to a finite region of spacetime does not have a unique solution. We will describe and compare various quasi-local mass quantities which have been useful in general relativity. We will also discuss comparison-type theorems for polyhedral surfaces which have been developed over the past few years and how these relate to quasi-local masses.

#### About Richard Schoen:

**Poster:** Schoen.pdf

### Felix Otto

#### Max Planck Institut

**Visit:**

#### About Felix Otto:

### Johannes Sjostrand

#### Institut de Mathématiques de Bourgogne

**Visit:**