[petsc-users] Question with filedsplit in PETSc

[Zhu, Qiming]

Dear all,


Sorry to disturb you. I am a user of Petsc. I am trying to use Fieldsplit in Petsc to do preconditioning for Navier-Stokes problem. I have some problems when I trying to use Fieldsplit function. I am now defining the nest matrix first, then I get the IS from nested matrix. But I find that my code just work for one core. When I change to parallel case, I could only get zero solution. I wonder is there any special requirements for IS definition in Fieldsplit? I include one code here. If you have any idea, hope you reply soon. Thank you for your help. Thank you very much.


Yours sincerely,

Qiming Zhu,

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