# Seminars & Colloquia Calendar

## The geometry of spacetimes

#### Annegret Burtscher, Rutgers University

Location: ** Hill 705**

Date & time: Thursday, 15 February 2018 at 11:00AM - 11:45AM

** Abstract: **In Einstein's general theory of relativity, gravity is described as a geometric property of space and time. More precisely, these spacetimes are four-dimensional Lorentzian manifolds, and via the Einstein equations their curvature is related to the energy and momentum of whatever matter is present. We are particularly interested in stellar models, which can be described by a perfect fluid. According to the (mostly resolved) “fluid ball conjecture” non-rotating stellar models are automatically also spherically symmetric and are thus modeled by the Tolman-Oppenheimer-Volkoff equation. With all these restrictions in place, one still has to solve a system of singular and highly nonlinear ordinary differential equations. We will discuss what is known about the geometry of these solutions, and how the asymptotic behavior relates to properties of the fluid and other solutions in general relativity.

R. Shapiro Organizer's Page

Chiara Damiolini, Ian Coley and Franco Rota -Charles Weibel Organizer's Page

Brooke Logan

Wujun Zhang Organizer's webpage

P. Gupta, X.Huang and J. Song Organizer's webpage

Swastik Kopparty, Sepehr Assadi Seminar webpage

Jeffry Kahn, Bhargav Narayanan, Jinyoung Park Organizer's webpage

Brooke Ogrodnik, Website

Robert Dougherty-Bliss and Doron Zeilberger --> homepage

Paul Feehan, Daniel Ketover, Natasa Sesum Organizer's webpage

Lev Borisov, Emanuel Diaconescu, Angela Gibney, Nicolas Tarasca, and Chris Woodward Organizer's webpage

Jason Saied Seminar webpage

Brian Pinsky, Rashmika Goswami website

Quentin Dubroff Organizer's webpage

James Holland; Organizer website

Edna Jones Organizer's webpage

Brooke Ogrodnik website

Yanyan Li, Zheng-Chao Han, Jian Song, Natasa Sesum Organizer's Webpage

Organizer: Luochen Zhao

Yanyan Li, Zheng-Chao Han, Natasa Sesum, Jian Song Organizer's Page

Lisa Carbone, Yi-Zhi Huang, James Lepowsky, Siddhartha Sahi Organizer's webpage

Simon Thomas website

Kasper Larsen, Daniel Ocone and Kim Weston Organizer's page

Joel Lebowitz, Michael Kiessling

Yanyan Li, Haim Brezis Organizer's Webpage

Stephen D. Miller, John C. Miller, Alex V. Kontorovich, Alex Walker seminar website

Stephen D. Miller

Brooke Ogrodnik, Website

Organizers: Yanyan Li, Z.C. Han, Jian Song, Natasa Sesum

Yael Davidov Seminar webpage

Kristen Hendricks, Xiaochun Rong, Hongbin Sun, Chenxi Wu Organizer's page

Fioralba Cakoni Seminar webpage

Ebru Toprak, Organizer

Organizer's webpage: Organizer's webpage

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