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Re: Issues with eigs


From: Dmitri A. Sergatskov
Subject: Re: Issues with eigs
Date: Sun, 9 Sep 2018 16:01:04 -0500



On Sun, Sep 9, 2018 at 3:16 PM Thomas D. Dean <address@hidden> wrote:


Ubuntu 16.04

 > dpkg -l | grep -i lapack
ii  liblapack-dev                              3.6.0-2ubuntu2
                    amd64        Library of linear algebra routines 3 -
static version
ii  liblapack3                                 3.6.0-2ubuntu2
                    amd64        Library of linear algebra routines 3 -
shared version

 > dpkg -l | grep -i arpack
ii  libarpack2                                 3.3.0-1build2
                    amd64        Fortran77 subroutines to solve large
scale eigenvalue problems
ii  libarpack2-dev                             3.3.0-1build2
                    amd64        Fortran77 subroutines to solve large
scale eigenvalue problems (development)

Looks like I should not have this problem???

I think Manav is talking here about the original problem ("error -8")...

I have lapack 3.8.0 and I also see fluctuations in eigs output.
It looks to me some variable (initial guess?) is not defined and it
is picking up some junk.


Tom Dean


Dmitri.
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