[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.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: 
<http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20110314/9c5c8996/attachment.htm>