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Is there (good) literature that provides more information about
solving systems of PDE with geometric/algebraic multigrid?<br>
<br>
Am 03.02.2012 14:11, schrieb Jed Brown:
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cite="mid:CAM9tzS=d8MC0O=ht3PV55pGnHua2Y-HN1FxAYntQpoi0-f-c0w@mail.gmail.com"
type="cite">
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<div class="gmail_quote">On Fri, Feb 3, 2012 at 16:03, Thomas
Witkowski <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:thomas.witkowski@tu-dresden.de">thomas.witkowski@tu-dresden.de</a>></span>
wrote:<br>
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<div id=":2u8">The system writes<br>
<br>
L 0 M<br>
M L 0<br>
L M L<br>
<br>
With L = discrete laplace, M = mass matrix, 0 = empty
matrix</div>
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<div>Hmm, what are the relative scales of these equations?</div>
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<div class="im"><br>
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<br>
AMG is more delicate and generally less robust for
systems.<br>
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Is this different with geometric multigrid?</div>
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<br>
<div>Null space issues are usually easier with geometric, but
constructing low energy interpolants can require custom work.</div>
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