Sorry for the late update. I tested the code with the branch: ksp-zero-eig
But the problem seems to still be there, also tried: -ksp_chebyshev_estimate_eigenvalues_random but does not change. Just tell me what test you need and I'll try to do them. Best, Filippo On Wednesday 29 October 2014 10.30:14 Mark Adams wrote: > > Yeah, that should work; an alternative is to defer the estimate until > > the next solve. > > Sounds better. As I said one of my users has a zero RHS on the first solve.
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