| Hello, Has there been any follow-up on this https://lists.mcs.anl.gov/pipermail/petsc-users/2015-January/024020.html? Given a 3x3 MatNest A = [A_00,0,0 ; 0,A_11,0 ; 0,0,A_22], I’d like to setup a two-way fieldsplit coupling [A_00,0 ; 0,A_11] and [A_22] but I can’t figure out the proper options. Jed, in this answer https://lists.mcs.anl.gov/pipermail/petsc-users/2015-January/023993.html, you recommend not to use MatNest. What would you recommend instead? Even defining a 2x2 MatNest B = [B_00,0 ; 0,A_22] with B_00 = [A_00,0 ; 0,A_11] sounds bad to you? Thanks for your help, Pierre PS: this is just a dummy example with 0s everywhere. |
nest.cpp
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