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Description
  • Saddle point problems with singular or indefinite pivot blockmatrix arise in various applications. In some problems it may be necessary to regularize the corresponding matrix is some way. By straightforward derivations it is shown that use of certain preconditioners on block diagonal and block triangular form can be very efficient, both for the original matrix and for its regularized forms. As the value of regularization parameter increases, the eigenvalues cluster at unity or at just two points on the real line.
  • Saddle point problems with singular or indefinite pivot blockmatrix arise in various applications. In some problems it may be necessary to regularize the corresponding matrix is some way. By straightforward derivations it is shown that use of certain preconditioners on block diagonal and block triangular form can be very efficient, both for the original matrix and for its regularized forms. As the value of regularization parameter increases, the eigenvalues cluster at unity or at just two points on the real line. (en)
Title
  • Preconditioners for regularized saddle point matrices
  • Preconditioners for regularized saddle point matrices (en)
skos:prefLabel
  • Preconditioners for regularized saddle point matrices
  • Preconditioners for regularized saddle point matrices (en)
skos:notation
  • RIV/68145535:_____/11:00361645!RIV12-AV0-68145535
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  • Z(AV0Z30860518)
http://linked.open...iv/cisloPeriodika
  • 2
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
  • Axelsson, Owe
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  • 222676
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  • RIV/68145535:_____/11:00361645
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  • saddle point matrices; preconditioning; regularization; eigenvalue clustering (en)
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  • DE - Spolková republika Německo
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  • [D27D27D8166B]
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  • Journal of Numerical Mathematics
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  • 19
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  • Axelsson, Owe
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  • 000292773100001
http://linked.open...n/vavai/riv/zamer
issn
  • 1570-2820
number of pages
http://bibframe.org/vocab/doi
  • 10.1515/JNUM.2011.005
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