[SciPy-dev] [arpack] eigen_symmetric and the sigma value

Matthieu Brucher matthieu.brucher@gmail....
Thu Feb 28 08:01:25 CST 2008


According to the tickets, it seems that the shift are implemented for real
matrices, isn't it ?

Matthieu

2008/2/28, Aric Hagberg <hagberg@lanl.gov>:
>
> On Thu, Feb 28, 2008 at 02:35:50PM +0100, Matthieu Brucher wrote:
> > Is there any plan of adding the support of the sigma keyword, like it is
> > done in Matlab (
> http://www.mathworks.com/access/helpdesk/help/techdoc/ref/**
> > eigs.html) ?
>
>
> Yes, it's on my TODO list.  It would be good to implement most, if not
> all, of the shift-invert spectral transform modes along with the
> generalized eigenproblem modes.  The current tickets are
> http://www.scipy.org/scipy/scipy/ticket/231
> and
> http://www.scipy.org/scipy/scipy/ticket/418
>
> Any help is welcome.
>
> Aric
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