Previous Special Year Seminar

Jan
22
2019

Variational Methods in Geometry Seminar

(Non)uniqueness questions in mean curvature flow
3:30pm|Simonyi Hall 101

Mean curvature flow is the negative gradient flow of the volume functional which decreases the volume of (hyper)surfaces in the steepest way. Starting from any closed surface, the flow exists uniquely for a short period of time, but always develops...

Jan
22
2019

Variational Methods in Geometry Seminar

Symplectic methods for sharp systolic inequalities
Umberto Hryniewicz
1:00pm|Simonyi Hall 101

In this talk I would like to explain how methods from symplectic geometry can be used to obtain sharp systolic inequalities. I will focus on two applications. The first is the proof of a conjecture due to Babenko-Balacheff on the local systolic...

Jan
15
2019

Variational Methods in Geometry Seminar

Minimal surfaces with index one in spherical space forms
Celso Viana
3:30pm|Simonyi Hall 101

Minimal surfaces are critical points of the area functional. In this talk I will discuss classification results for minimal surfaces with index one in 3-manifolds with non-negative Ricci curvature and outline the proof that in spherical space forms...

Jan
15
2019

Variational Methods in Geometry Seminar

Regularity of weakly stable codimension 1 CMC varifolds
1:00pm|Simonyi Hall 101

The lecture will discuss recent joint work with C. Bellettini and O. Chodosh. The work taken together establishes sharp regularity conclusions, compactness and curvature estimates for any family of codimension 1 integral $n$-varifolds satisfying: (i...

Dec
18
2018

Variational Methods in Geometry Seminar

Bounds in Renormalized Volume for Hyperbolic 3-manifolds
Franco Vargas Pallete
1:00pm|Simonyi Hall 101

Renormalized volume (and more generally W-volume) is a geometric quantity found by volume regularization. In this talk I'll describe its properties for hyperbolic 3-manifolds, as well as discuss techniques to prove optimality results.

Dec
11
2018

Variational Methods in Geometry Seminar

Harmonic maps into singular spaces
3:30pm|Simonyi Hall 101

In the 90's, Gromov and Schoen introduced the theory of harmonic maps into singular spaces, in particular Euclidean buildings, in order to understand p-adic superrigidity. The study was quickly generalized in a number of directions by a number of...

Dec
11
2018

Variational Methods in Geometry Seminar

Density and equidistribution of minimal hypersurfaces
1:00pm|Simonyi Hall 101

I will outline the proof of density of minimal hypersurfaces (Irie-Marques-Neves) and equidistribution of minimal hypersurfaces (Marques-Neves-Song).

Dec
04
2018

Variational Methods in Geometry Seminar

Global results related to scalar curvature and isoperimetry
1:00pm|Simonyi Hall 101

I will first survey some recent progress on global problems related to scalar curvature and area/volume, focusing in particular on scale breaking phenomena in such problems. I will then discuss the role of the Hawking mass in the resolution of this...

Nov
27
2018

Variational Methods in Geometry Seminar

Bubbling theory for minimal hypersurfaces
Ben Sharp
3:30pm|Simonyi Hall 101

We will discuss the bubbling and neck analysis for degenerating sequences of minimal hypersurfaces which, in particular, lead to qualitative relationships between the variational, topological and geometric properties of these objects. Our aim is to...

Nov
27
2018

Variational Methods in Geometry Seminar

Homotopical effects of k-dilation
1:00pm|Simonyi Hall 101

Back in the 70s, Gromov started to study the relationship between the Lipschitz constant of a map (also called the dilation) and its topology. The Lipschitz constant describes the local geometric features of the map, and the problem is to understand...