[petsc-users] is it possible to gather a distributed matrix to a subset of processors?

[Fande Kong]

Hi all,

I want to solve a coarse problem on a subset of processors, but the matrix
already has been distributed across all processors. The coarse problem is
not small enough to solve using a single core. I want to solve this coarse
problem using superLU on a small number of processors. Is it possible to
gather a distributed matrix to a subset of processors?

Thanks,

Fande,
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