On 3/2/26 00:26, Praveen C wrote:
Is it possible to use AMG preconditioner from Petsc or Trilinos with
dealii::SolverGMRES ?
The dealii::Solver* classes all just require the matrix and the preconditioner
to be linear operators, i.e., classes with a vmult() function. In your case,
these may be block operators that internally call AMG functions from PETSc or
Trilinos. You may be interested in taking a look here, for example:
https://dealii.org/developer/doxygen/deal.II/step_22.html#step_22-BlockSchurcomplementpreconditioner
Best
W.
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