**SMS scnews item created by Daniel Daners at Mon 21 Mar 2011 0818**

Type: Seminar

Distribution: World

Expiry: 28 Mar 2011

**Calendar1: 28 Mar 2011 1400-1500**

**CalLoc1: Mills Room 202**

Auth: daners@bari.maths.usyd.edu.au

### PDE Seminar

# Ricci flow and the determinant of the Laplacian on non-compact surfaces

### Rochon

Frédéric Rochon

Australian National University

28 March 2010, 2-3pm, Mills Lecture Room 202 (note the location)

## Abstract

After introducing the notion of determinant of the Laplacian on a non-compact surface with ends asymptotically isometric to a cusp or a funnel, we will show that in a given conformal class (with 'renormalized area' fixed), this determinant is maximal for the metric of constant scalar curvature, generalizing a well-known result of Osgood, Phillips and Sarnak in the compact case. This will be achieved by combining a corresponding Polyakov formula with some long time existence result for the Ricci flow for such metrics. This is a joint work with P. Albin and C.L. Aldana.

Check also the PDE Seminar page. Enquiries to Florica Cîrstea or Daniel Daners.