On 2013-11-29 16:48, Nico Schlömer wrote:
Hi all,
I'm looking at implementing an interface to PETSc's FieldSplit for
block preconditioning (Garth has already started work on this,
<https://bitbucket.org/fenics-project/dolfin/commits/branch/garth%2Fpetsc-fieldsplit>.
For block preconditioning, one obviously needs to identify the blocks.
Given a (linear) operator _A, is there currently a way to extract
information about what indices are associated with what variable?
I've got a working demo on Bitbucket - just doing the final clean-up.
I'll send a link to the mailing list in a few days. If you're curious,
you can dig it up on Bitbucket, but it is still rough.
Garth
Cheers,
Nico
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