"Kong, Fande" <[email protected]> writes: > Any references on this topic except the users manual? I am interested in > mathematics theory on this topic.
These are relevant. I've only skimmed them briefly, but they might suggest ways to improve PETSc's handling of singular systems. The technique is ancient. https://doi.org/10.1137/S0895479803437803 https://doi.org/10.1007/s10543-009-0247-7
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