[petsc-users] eigenvalues in a band

[Umut Tabak]

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pages however they are really outdated fortran codes, at least the ones 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. Ther////// 
<http://www.google.nl/url?sa=t&source=web&cd=3&ved=0CC4QFjAC&url=http%3A%2F%2Fwww.eecs.berkeley.edu%2F%7Edemmel%2Feigen_templates.ps.Z&rct=j&q=template%20book%20eigenvalue%20solvers&ei=VvUFTt64PIaYOorarMoN&usg=AFQjCNFP4xBp8uDJVorqIQKmhW_mTS0q_Q&sig2=cifrCOjj-K9t4LeqmSLTYQ><http://www.google.nl/url?sa=t&source=web&cd=3&ved=0CC4QFjAC&url=http%3A%2F%2Fwww.eecs.berkeley.edu%2F%7Edemmel%2Feigen_templates.ps.Z&rct=j&q=template%20book%20eigenvalue%20solvers&ei=VvUFTt64PIaYOorarMoN&usg=AFQjCNFP4xBp8uDJVorqIQKmhW_mTS0q_Q&sig2=cifrCOjj-K9t4LeqmSLTYQ>e 
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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20110625/d534ce54/attachment.htm>