Previous Conferences & Workshops

Mar
06
2019

Workshop on Geometric Functionals: Analysis and Applications

Existence and uniqueness of Green's function to a nonlinear Yamabe problem
3:00pm|Simonyi Hall 101

Abstract: For a given finite subset S of a compact Riemannian manifold (M; g) whose Schouten curvature tensor belongs to a given cone, we establish a necessary and
sufficient condition for the existence and uniqueness of a conformal metric on $M...

Mar
06
2019

Workshop on Geometric Functionals: Analysis and Applications

Nature of some stationary varifolds near multiplicity 2 tangent planes
2:00pm|Simonyi Hall 101

Abstract: It is a basic open question in geometric measure theory to understand regularity of a stationary integral varifold. Even a.e. regularity remains an open question. The central issue is analyzing the varifold near a point Z with a tangent...

Mar
06
2019

Theoretical Machine Learning Seminar

Exponentiated Gradient Meets Gradient Descent
Will Grathwohl
1:30pm|Princeton University, CS 302

The (stochastic) gradient descent and the multiplicative update method are probably the most popular algorithms in machine learning. We introduce and study a new regularization which provides a unification of the additive and multiplicative updates...

Mar
06
2019

Workshop on Geometric Functionals: Analysis and Applications

Loop products, closed geodesics and self-intersections
11:30am|Simonyi Hall 101

Abstract: Let M be a compact Riemannian manifold. Morse theory for the energy function on the free loopspace LM of M gives a link between geometry and topology, between the growth of the index of the iterates of closed geodesics on M, and the...

Mar
06
2019

Workshop on Geometric Functionals: Analysis and Applications

Normalized harmonic map flow
Michael Struwe
10:00am|Simonyi Hall 101

Abstract: Finding non-constant harmonic 3-spheres for a closed target manifold N is a prototype of a super-critical variational problem. In fact, the
direct method fails, as the infimum of the Dirichlet energy in any homotopy class of maps from the...

Mar
05
2019

Workshop on Geometric Functionals: Analysis and Applications

Liouville Equations and Functional Determinants
4:00pm|Simonyi Hall 101

Abstract: Functional Determinants are quantities constructed out of spectra of conformally covariant operators, and are explicit in dimension two and four, due to formulas by Polyakov and Branson-Oersted. Extremizing them in a conformal class...

Mar
05
2019

Workshop on Geometric Functionals: Analysis and Applications

Periodic Geodesics and Geodesic Nets on Riemannian Manifolds
2:30pm|Simonyi Hall 101

Abstract: I will talk about periodic geodesics, geodesic loops, and geodesic nets on Riemannian manifolds. More specifically, I will discuss some curvature-free upper bounds for compact manifolds and the existence results for non-compact manifolds...