A block-preconditioner for a special reg
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Tommy Elfving; Ingegerd Skoglund
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Article
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2007
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John Wiley and Sons
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English
β 203 KB
## Abstract We consider a linear system of the form __A__~1~__x__~1~ + __A__~2~__x__~2~ + Ξ·=__b__~1~. The vector Ξ·consists of independent and identically distributed random variables all with mean zero. The unknowns are split into two groups __x__~1~ and __x__~2~. It is assumed that __A____A__~1~ h