http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Mat/MatSetBlockSize.html
PCML, PCHYPRE, and PCGAMG pay attention to this parameter if no richer information (like near-null spaces) is provided. For complex-valued problems, you're likely better off using complex numbers. On Sat, Mar 23, 2013 at 2:25 PM, Nico Schl?mer <nico.schloemer at gmail.com>wrote: > Hi, > > I've got this linear system consisting of 2x2 blocks (acutally coming > from a real-imaginary formulation of a complex-valued problem) and I'd > like to precondition the linear solves with AMG. Things are already > working well when taking the defaults, but I guess one could achieve > way better when telling AMG about the 2x2 structure. Trilinos' ML does > this by a parameter "PDE equations". -- Is there something comparable > in the PETSc world? > > --Nico > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20130323/93cf4ae8/attachment.html>
