[petsc-users] Ksp Initial residual norm

[Edoardo alinovi]

Dear all,

I have a very simple question for you. How can I get the initial residual
from a ksp solver? I can easily extract the final (preconditioned) residual
norm  but  when I try to use to do the same with the initial residual using:

kspInitialResidual()

PETSc tells me that this feature is not supported. I am actually doing it
applying the definition of residual "by hand", but I am wondering if
somenthing already built-in is available or not.

Thank you very much!
------

Edoardo Alinovi, Ph.D.

DICCA, Scuola Politecnica,
Universita' degli Studi di Genova,
1, via Montallegro,
16145 Genova, Italy

Email: edoardo.alinovi at dicca.unige.it
Tel: +39 010 353 2540
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