National Repository of Grey Literature 18 records found  previous11 - 18  jump to record: Search took 0.00 seconds. 
Redukce datových modelů
Řimnáč, Martin
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Plný tet: 0086355 - Download fulltextPDF
Web Search Engines and Linear Algebra
Špánek, Roman
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Plný tet: v974-06 - Download fulltextPDF
O limitní přesnosti segregovaných technik pro sedlobodové úlohy
Jiránek, P. ; Rozložník, Miroslav
In this contribution, we analyze the numerical behavior of the Schur complement reduction method and the null-space projection method – two representatives of segregated methods used to solve large- scale saddle point systems. They are both based on the transformation of the original problem to the reduced form which is solved iteratively (e.g. by the conjugate gradient method) giving approximations to one block component of the solution vector. The remaining unknowns are solved by the back-substitution to the original system. Depending on the actual implementation, we estimate the maximum attainable accuracy level of the computed approximate solution.

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