21–26 Jun 2026
U. Ottawa - Learning Crossroads (CRX) Building
America/Toronto timezone
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Positive mass theorems for toric gravitational instantons

25 Jun 2026, 15:15
15m
C309 (cap. 60) (U. Ottawa - Learning Crossroads (CRX) Building)

C309 (cap. 60)

U. Ottawa - Learning Crossroads (CRX) Building

Oral (Non-Student) / Orale (non-étudiant(e)) Theoretical Physics / Physique théorique (DTP-DPT) (DTP) R1-5 Black Holes, Solitons, and Instantons | Trous noirs, solitons et instantons (DPT)

Speaker

Prof. Hari Kunduri (McMaster University, Mathematics and Physics)

Description

A gravitational instanton is a four-dimensional, complete Ricci flat manifold with prescribed asymptotic behaviour (e.g. asymptotically locally flat). They arise in general relativity as saddle points of the Euclidean gravitational path integral. We will describe a new set of a mass comparison theorems for manifolds with non-negative scalar curvature. Their mass is bounded below the mass of a gravitational instanton `ground state' in the same asymptotic class.

Keyword-1 Black Holes
Keyword-2 general relativity

Author

Prof. Hari Kunduri (McMaster University, Mathematics and Physics)

Presentation materials