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Dear all,<br>
<br>
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. <br>
<br>
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the netlib pages however they are really outdated fortran codes, at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.<br>
<br>
P.S. Ther<a
href="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"
class="l"><em></em><em></em><em></em></a><a
href="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"
class="l"></a><span class="tl"></span>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.<br>
<br>
Best regards,<br>
Umut<br>
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