Please note that the list below only shows forthcoming events, which may not include regular events that have not yet been entered for the forthcoming term. Please see the past events page for a list of all seminar series that the department has on offer.

 

Past events in this series


Mon, 02 Jun 2025
14:15
L5

Laplacian spectra of minimal submanifolds in the hyperbolic space

Gerasim Kokarev
(Leeds)
Abstract
I will describe an extremal problem for the fundamental tone of submanifolds in the hyperbolic space, and will show that singular minimal submanifolds occur as natural maximisers for it. I will also discuss a closely related rigidity phenomenon for the Laplacian spectra of minimal submanifolds.
Mon, 09 Jun 2025
12:15
L5

3-(α,δ)-Sasaki manifolds and strongly positive curvature

Ilka Agricola
(Philipps-Universität Marburg)
Abstract
3-(α,δ)-Sasaki manifolds are a natural generalisation of 3-Sasaki manifolds, which in dimension 7 are intricately related to G2 geometry. We show how these are closely related to various types of quaternionic Kähler orbifolds via connections with skew-torsion and an interesting canonical submersion. Making use of this relation we discuss curvature operators and show that in dimension 7 many such manifolds have strongly positive curvature, a notion originally introduced by Thorpe.