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March 2021

Silvia Gazzola, University of Bath, Iterative regularization methods for large-scale linear inverse problems

March 23 | 3:00 pm - 4:00 pm EDT

 Inverse problems are ubiquitous in many areas of Science and Engineering and, once discretized, they lead to ill-conditioned linear systems, often of huge dimensions: regularization consists in replacing the original system by a nearby problem with better numerical properties, in…

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Lars Ruthotto, Emory University

March 30 | 3:00 pm - 4:00 pm EDT

April 2021

Paul Cazeaux, The University of Kansas

April 6 | 3:00 pm - 4:00 pm EDT

Hussam Al Daas, STFC, Rutherford Appleton Laboratory, Two-level Nyström—Schur preconditioner for symmetric positive definite matrices

April 13 | 3:00 pm - 4:00 pm EDT

Randomized methods are becoming increasingly popular in numerical linear algebra. However, few attempts have been made to use them in developing preconditioners. Our interest lies in solving large-scale sparse symmetric positive definite linear systems of equations where the system matrix…

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