is a Mathematica implementation of
Mark van Hoeij
's algorithm for
finding rational solutions of linear difference equations.
The package has been developed by
a Postdoc of the
RISC Combinatorics group
a stay at the University of Ljubljana with Marko Petkovsek.
Registration and Legal Notices
The source code for this package is password protected. To get the password
send an email to
It will be given for free to all researchers and non-commercial users.
Copyright © 1999–2019 The RISC Combinatorics Group, Austria — all rights reserved.
Commercial use of the software is prohibited without prior written permission.
A Note on Encoded Files
This package contains one or more Mathematica input files which are encoded. Those files
cannot be read or modified directly as plain text, but can be loaded into
Mathematica just like any normal input file (i.e., with
There is no need (and also no way) to decode them by using additional software
or a special key.
If loading an encoded file causes a syntax error, open it with a
text editor and remove any blank lines at the beginning (for some
reason your Mac could have inserted them silently...).
package consists of the files
to see the package in action.
The theoretical background for the algorithm has been described in
M. van Hoeij, Rational Solutions of Linear Difference Equations,
ISSAC '98 Proceedings, pp. 120-123, 1998, available in electronic form also
Versions and Bugs
The current version of the package is 1.05 last updated on July 16, 2002.
Please report any bugs and comments to