[petsc-users] can MatGetSubMatrix extract remote rows?

[Fande Kong]

Hi all,

I am confused with MatGetSubMatrix and MatGetSubMatrices.  In my
understanding, I think MatGetSubMatrix extracts local rows and columns to
form another parallel matrix with the same communicator, while
MatGetSubMatrices extracts both local and remote entities to construct some
sequential matrices. Is it right?

Thanks,

Fande,