Quantitative estimates for geometric variational problems
The link for participation in the event is the following: fernuni.zoom.us/j/64850280617.
Thursday, December 1st, 2022
5 p.m., on Zoom
In this talk, we address the numerical solution of nonlinear eigenvector problems arising in computational physics and chemistry. These problems characterize critical points of the underlying energy function on the infinite-dimensional Stiefel manifold. To efficiently compute energy minimizers, we propose a novel Riemannian gradient descent method induced by an energy-adaptive metric. The non-monotone line search and the inexact evaluation of Riemannian gradients substantially improve the overall efficiency of the method. Numerical experiments illustrate the performance of the method and demonstrates its competitiveness with well-established schemes.
(Joint work with R. Altmann and D. Peterseim)
Tatjana Stykel is a professor in the Institute of Mathematics and in the Centre for Advanced Analytics and Predictive Sciences (CAAPS) at the University of Augsburg.
Her research interests include numerical analysis, optimization, control and model reduction of complex dynamical systems with applications in circuit simulation, electromagnetic field problems and computational chemistry.
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