Michele Rosso <[email protected]> writes: > Barry, > > thank you. > I have another question: how does petsc compute the restriction > (assuming the user does not supply his own restriction)? > Does it use a simple transpose of the interpolation operator?
Yes, it uses the same. > Could you point me to the source code where this is done? See the implementation of PCMGGetInterpolation and PCMGGetRestriction. If you only provide one, the other will use it.
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