Is there (good) literature that provides more information about solving systems of PDE with geometric/algebraic multigrid?
Am 03.02.2012 14:11, schrieb Jed Brown: > On Fri, Feb 3, 2012 at 16:03, Thomas Witkowski > <thomas.witkowski at tu-dresden.de > <mailto:thomas.witkowski at tu-dresden.de>> wrote: > > The system writes > > L 0 M > M L 0 > L M L > > With L = discrete laplace, M = mass matrix, 0 = empty matrix > > > Hmm, what are the relative scales of these equations? > > > > AMG is more delicate and generally less robust for systems. > > Is this different with geometric multigrid? > > > Null space issues are usually easier with geometric, but constructing > low energy interpolants can require custom work. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120203/c3c31dee/attachment.htm>
