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ARPACK is dependent upon a number of subroutines from
LAPACK  and the
The necessary routines are distributed along with
the ARPACK software.
Whenever possible, BLAS routines that have
been optimized for the given machine should be used in place of
the ones provided with ARPACK. A list of routines
required from these two sources is available in Chapter 5.
If local installations of BLAS and/or LAPACK are available
then the corresponding ARPACK subdirectories may be deleted and the
local installations may be pointed to instead. Care should be taken
to verify consistency of the version dates of the local installations
with the version dates of the BLAS and LAPACK routines
provided with ARPACK.
NOTE: The LAPACK library on your system MUST be the public release.
The current release is version 2.0. If you are not certain if the
public release has been installed, we strongly recommend that you
compile and link to the subset of LAPACK included with