$ sudo apt-get install octave3.2 libarpack2
[sudo] password for achim:
Reading package lists... Done
Building dependency tree
Reading state information... Done
libarpack2 is already the newest version.
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libarpack2 : Depends: libblas3 but it is not going to be installed or
                       libblas.so.3 or
                       libatlas3-base but it is not installable
              Depends: liblapack3 but it is not going to be installed or
                       liblapack.so.3 or
                       libatlas3-base but it is not installable
 octave3.2 : Depends: libcholmod1.7.1 (>= 1:3.4.0) but it is not going to be installed
             Depends: libumfpack5.4.0 (>= 1:3.4.0) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.