Pari/GP pol-pfrac splits a Pari/GP polynomial fraction into partial fractions which sum to the original. See the comments in for details.

f = 2/(x^2-1);
v = pol_partial_fractions(f);
\\ gives  v == [ 1/(x-1), -1/(x+1) ]
\\ with   vecsum(v) == f is free software (free as in freedom), published under the terms of the GNU General Public License (v3 or higher). Download version 2 here, (16k, and sig)
pol-pfrac-2.tar.gz (26k, and sig)

The tar file has some self-tests but just is enough to run. The sig files are Gnu PG ascii armoured signatures generated from my key.

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