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- W57737106 abstract "In analogy to Neuberger’s double-pass algorithm for the Conjugate Gradient inversion with multishifts we introduce a double-pass variant for BiCGstab(‘). One possible application is the overlap operator of QCD at non-zero chemical potential, where the kernel of the sign function is nonHermitian. The sign function can be replaced by a partial fraction expansion, requiring multishift inversions. We compare the performance of the new method with other available algorithms, namely partial fraction expansions with restarted FOM inversions and the Krylov-Ritz method using nested Krylov subspaces." @default.
- W57737106 created "2016-06-24" @default.
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- W57737106 date "2010-01-01" @default.
- W57737106 modified "2023-09-23" @default.
- W57737106 title "Double pass variants for multi-shift BiCGStab(l)" @default.
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- W57737106 hasPublicationYear "2010" @default.
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