On correction equations and domain decomposition for computing invariant subspacesReportar como inadecuado




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1 SAGE - Simulations and Algorithms on Grids for Environment Inria Rennes – Bretagne Atlantique , IRISA-D1 - SYSTÈMES LARGE ÉCHELLE 2 Department of Computer Science and Engineering Minneapolis

Abstract : This paper considers a number of schemes for computing an approximate invariant subspace associated with the smallest eigenvalues of a sparse symmetric real matrix. The approach taken is that of the so-called ``correction equation- which leads to such standard schemes as the Jacobi-Davidson method or Olsen-s method. We consider the situation of block corrections and discuss two algorithms. The application of the viewpoint that is developed is then explored for Domain Decomposition methods.

Mots-clés : DOMAIN DECOMPOSITION EIGENVALUES INVARIANT SUBSPACE CORRECTION JACOBI-DAVIDSON BLOCK ALGORITHMS OLSEN





Autor: Bernard Philippe - Yousef Saad -

Fuente: https://hal.archives-ouvertes.fr/



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