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DTSTART:19810329T020000
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UID:news1472@dmi.unibas.ch
DTSTAMP;TZID=Europe/Zurich:20230417T092542
DTSTART;TZID=Europe/Zurich:20230428T110000
SUMMARY:Seminar in Numerical Analysis: Frédéric Nataf (CNRS — Universit
 é Pierre et Marie Curie)
DESCRIPTION:We introduce a scalable adaptive element-based domain decomposi
 tion (DD) method for solving saddle point problems defined as a block two 
 by two matrix. The algorithm does not require any knowledge of the constra
 ined space. We assume that all sub matrices are sparse and that the diagon
 al blocks are spectrally equivalent to a sum of positive semi definite mat
 rices. The latter assumption enables the design of adaptive coarse space f
 or DD methods that extends the GenEO theory to saddle point problems. Nume
 rical results on three dimensional elasticity problems for steel-rubber st
 ructures discretized by a finite element with continuous pressure are show
 n for up to one billion degrees of freedom along with comparisons to Algeb
 raic Multigrid Methods.\\r\\n\\r\\nFor further information about the semin
 ar\, please visit this webpage [t3://page?uid=1115].
X-ALT-DESC:<p>We introduce a scalable adaptive element-based domain decompo
 sition (DD) method for solving saddle point problems defined as a block tw
 o by two matrix. The algorithm does not require any knowledge of the const
 rained space. We assume that all sub matrices are sparse and that the diag
 onal blocks are spectrally equivalent to a sum of positive semi definite m
 atrices. The latter assumption enables the design of adaptive coarse space
  for DD methods that extends the GenEO theory to saddle point problems. Nu
 merical results on three dimensional elasticity problems for steel-rubber 
 structures discretized by a finite element with continuous pressure are sh
 own for up to one billion degrees of freedom along with comparisons to Alg
 ebraic Multigrid Methods.</p>\n\n<p>For further information about the semi
 nar\, please visit this <a href="t3://page?uid=1115" title="Opens internal
  link in current window">webpage</a>.</p>
DTEND;TZID=Europe/Zurich:20230428T120000
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