Jed Brown wrote: > On Fri, Apr 15, 2011 at 12:06, Thomas Witkowski > <thomas.witkowski at tu-dresden.de > <mailto:thomas.witkowski at tu-dresden.de>> wrote: > > Which package must be installed to make use of "ml" (algebraic > multigrid?) as a preconditioner? > > > ML, --download-ml > also -pc_type hypre (BoomerAMG is default) from, you guessed it, > Hypre, --download-hypre I tried it, but when I make use of BAIJ matrix format, as you have proposed, I get the following error:
Invalid matrix type for ML. ML can only handle AIJ matrices.! So can I make use of algebraic multigrid on block size matrices with this or one of the other packages? Thomas
