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Seminario Dottorato: Extrapolation techniques and applications to row-action methods

Wednesday 7 May 2014 h. 14:30 - Room 2BC30 - Anna Karapiperi

ARGOMENTI: Seminari Dottorato

SEMINARIO DOTTORATO

Wednesday 7 May 2014 h. 14:30, room 2BC30
Anna Karapiperi (Padova, Dip. Mat.)
"Extrapolation techniques and applications to row-action methods"

Abstract
The talk will be divided in three parts.
First we will introduce extrapolation methods and notions related to them, such us kernel and convergence acceleration. These definitions will be well understood by the examples of Aitken's Delta-squared process, Shanks' transformation and various generalizations.
Afterwards, we will pass to row-action methods that have several interesting properties (i.e. no changes to the original matrix and no operations on the matrix as a whole). We will focus on Kaczmarz and Cimmino method.
At the end we will see how extrapolation methods can be used for accelerating the convergence of the aforementioned row-action methods.

Rif. int. C. Marastoni, T. Vargiolu

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