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Looking for a Lamczos program in fortran

  1. Feb 1, 2013 #1
    Anyone can help me getting a source deck of Lanczos in f77 for large sparse Hermitian matrices? I need one that is user friendly. There is one written by Jane Cullum and Ralph Willowghbi that I find too difficult to use. Or is there some library that has it and can be linked?

    Thanks in advance
     
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  3. Feb 1, 2013 #2

    SteamKing

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    Have you tried LINPACK?
     
  4. Feb 1, 2013 #3

    SteamKing

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  5. Feb 1, 2013 #4

    AlephZero

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    I don't know that book, but it was written in 1985 so it dates back almost to the start of "practical" use of Lanczos eigensolution methods, and therefore I would be cautious about the quality of the algorithms. Also note the authors' largest test problem was only 5,000 DOF, which is 100 times smaller than today's concept of a "large" eigenproblem.

    Try http://www.caam.rice.edu/software/ARPACK/
     
  6. Feb 2, 2013 #5

    AlephZero

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