On Wed, 12 May 2010 01:05:47 -0400, Matthew Knepley <knepley at gmail.com> wrote: > FieldSplit is very simple. You just give an IS for each field which > numbers the dof in that field. Then you can combine the solvers > additively or multiplicatively on the command line. I do not think we > have a specific example, but you can do this from the command line for > any DA example, such as SNES ex19.
A few examples: $ grep pc_fieldsplit `find src -name makefile` Chris, PCFieldSplit has not changed since the release, but support for more general factorization (Schur) splits and geometric multigrid inside of splits will go into petsc-dev. Jed
