"Kong, Fande" <[email protected]> writes: > Hi All, > > What is the definition of KSPNormType natural? It is easy to understand > none, preconditioned, and unpreconditioned, but not natural.
It is the energy norm. It only makes sense for an SPD operator and SPD
preconditioner.
||x||_{P^{-1/2} A P^{-T/2}}
though of course it is not computed this way.
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