[petsc-dev] Hermitian transpose in MatPtAP and other matrix-matrix operations

[Jed Brown]

We should provide a general mechanism, maybe in the form of an additional
argument, to enable Hermitian transpose versus real transpose for all these
operations.

It pains me to tell someone on petsc-maint that they should use
MatHermitianTranspose() for a PtAP-like operation.
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