[petsc-users] Nested Poisson Solver

[Alan Wei]

Dear Sir/Madam,
    Recently, I studied the /src/ksp/ksp/example/tutorial/ex29.c of solving
a 2D Poisson equation. It employs the Multigrid Method on a uniform
coordinate. I wonder if there is a way to solve the Poisson equation with a
nested grid in PETSc. Any suggestions on any example or thoughts is greatly
appreciated. ^_^

best,
Alan
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