Umut,
You might find this article to be of use,
http://portal.acm.org/citation.cfm?id=1236464 also here
http://www.mcs.anl.gov/uploads/cels/papers/P1263.pdf
Barry
On Jun 25, 2011, at 9:55 AM, Umut Tabak wrote:
> Dear all,
>
> I am sorry for a question that is not directly related to PETSc however there
> is large community with a lot experienced people. So the question fits I
> guess.
>
> I would like to extract the eigenvalues/vectors from a band, say such a range
> as [a,b]. I found out that there are some packages on the netlib pages
> however they are really outdated fortran codes, at least the ones I checked
> and there should be a lot of changes on the codes. I was wondering if there
> is already a package that does what I would like to reach at the end, the
> range eigenvalues and vectors. So I would be glad if someone who knows some
> packages that is capable of this operation, would share his/her experience.
>
> P.S. There is SLEPc however they are not supporting the band option yet,
> however use of two shifts might be an option and then I can do some
> post-processing later on to extract the information that I would like. So on
> that I am aware of.
>
> Best regards,
> Umut
