I am doing specific tests on matrices, so forgive me if this question doesn't seem related to Petsc typical use.
I have a
SEQAIJ matrix on one process and I need to send it to another one. Is there a Petsc routine that enables this ?
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I don't think PETSc supports it. PETSc really thinks in parallel, so it converts at most between distributed matrices and sequential matrices through submatrix taking operations. I would MatGetArray and send that with an MPI call.