[petsc-users] Multi level DM Shell

Luc Berger-Vergiat lb2653 at columbia.edu
Mon Feb 3 15:32:48 CST 2014

I'm fairly sure I know the answer to this question after looking up the source code but is it possible to create sub-splits while using a DMShell?
To be more specific I have a matrix which I decompose into 4 fields and I would like to do something like

-ksp_type gmres
-pc_type fieldsplit
-pc_fieldsplit_type schur
-pc_fieldsplit_schur_factorization_type full
-pc_fieldsplit_schur_precondition self
-pc_fieldsplit_0_fields 0,1
-pc_fieldsplit_1_fields 2,3

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