[petsc-users] Coupling HYPRE with PETSc for local grid refinement

[Alan]

Dear Folks,
I hope you're having a nice day.
I'm trying to couple HYPRE with PETSc in order to use PETSc solvers to
obtain solutions (Poisson Equation) with local refined grid from HYPRE.
Is there any examples in PETSc that I can refer? or is there any
examples in PETSc which introduce such a way that the Matrix is imported
from external software rather than generated by PETSc.

thanks,
Alan