Seminars and Colloquia by Series

Friday, April 12, 2019 - 15:05 , Location: Skiles 246 , Adrian P. Bustamante , Georgia Tech , Organizer: Adrian Perez Bustamante
Thursday, April 11, 2019 - 15:05 , Location: Skiles 006 , Paul Hand , Northeastern University , , Organizer: Michael Damron
Neural networks have led to new and state of the art approaches for image recovery. They provide a contrast to standard image processing methods based on the ideas of sparsity and wavelets.  In this talk, we will study two different random neural networks.  One acts as a model for a learned neural network that is trained to sample from the distribution of natural images.  Another acts as an unlearned model which can be used to process natural images without any training data.  In both cases we will use high dimensional concentration estimates to establish theory for the performance of random neural networks in imaging problems.
Wednesday, April 10, 2019 - 15:00 , Location: Skiles 006 , Vladimir Koltchinskii , Georgia Tech , , Organizer: Galyna Livshyts
Series: PDE Seminar
Tuesday, April 9, 2019 - 15:00 , Location: Skiles 006 , Professor Gieri Simonett , Vanderbilt University , , Organizer: Xukai Yan
I will consider the motion of a rigid body with an interior cavity that is completely filled with a viscous fluid. The equilibria of the system will be characterized and their stability properties are analyzed. It will be shown that the fluid exerts a stabilizing effect, driving the system towards a state where it is moving as a rigid body with constant angular velocity. In addition, I will characterize the critical spaces for the governing evolution equation, and I will show how parabolic regularization in time-weighted spaces affords great flexibility in establishing regularity and stability properties for the system. The approach is based on the theory of Lp-Lq maximal regularity. (Joint work with G. Mazzone and J. Prüss).
Monday, April 8, 2019 - 14:00 , Location: Skiles 006 , Tye Lidman , NCSU , Organizer: Jennifer Hom
Monday, April 8, 2019 - 12:50 , Location: Skiles 005 , Mengyuan Zhang , University of California, Berkeley , , Organizer: Justin Chen
Monday, April 8, 2019 - 12:45 , Location: Skiles 006 , Tye Lidman , NCSU , Organizer: Jennifer Hom
Monday, April 8, 2019 - 11:15 , Location: Skiles 005 , M. Capinski , Jagiellonian University/Florida Atlantic University , Organizer: Rafael de la Llave
We present a topological mechanism of diffusion in a priori chaotic systems. The method leads to a proof of diffusion for an explicit range of perturbation parameters. The assumptions of our theorem can be verified using interval arithmetic numerics, leading to computer assisted proofs. As an example of application we prove diffusion in the Neptune-Triton planar elliptic restricted three body problem. Joint work with Marian Gidea.
Thursday, April 4, 2019 - 15:05 , Location: Skiles 006 , Mayya Zhilova , School of Mathematics, GaTech , Organizer: Christian Houdre
Wednesday, April 3, 2019 - 15:00 , Location: Skiles 170 , Hongyi Zhou , Georgia Institute of Technology , , Organizer: Surena Hozoori