The "Littlewood-Richardson Calculator" is a package of C and Maple programs for computing Littlewood-Richardson coefficients. The C programs form the engine of the package, providing fast calculation of single LR coefficients, products of Schur functions, and skew Schur functions. The Maple code mainly gives an interface which makes it possible to use the C programs from Maple. This interface uses the same notation as the SF package of John Stembridge, to make it easier to use both packages at the same time.
The Littlewood-Richardson Calculator package is open source software (under the GNU General Public License). To install it, download the file
lrcalc-1.1.2.tar.gz
% gunzip lrcalc-1.1.tar.gz
% tar xvf lrcalc-1.1.tar
This will create a directory named lrcalc and put all the
necessary files in it. Now change to the directory and run the
program ./configure to compile the programs:
% cd lrcalc
% ./configure
After that you can use the package from Maple by reading the file
lrcalc. This makes the Maple commands
lrcoef, tos, and skew
available. Please refer to the README file in the lrcalc
directory for more details, and see the CHANGELOG file for a list of bug
fixes and enhancements.
I will be grateful for any comments or bug reports for this package. Enjoy!