[petsc-users] Howto understand the output of -ksp_monitor_singular_value

[Jed Brown]

2011/3/14 Gong Ding <gdiso at ustc.edu>
>
>
> >From above values, how to extract the condition number of (preconditioned)
> matrix?
>
>
The estimate comes from the Krylov polynomial which increases by one degree
on each iteration. The final condition number estimate will almost always be
the biggest and most accurate.
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