The LEDA research version can be used free of charge for academic research and teaching. However, it is not in the public domain and its use requires a research license which is distributed by the Max-Planck-Institut für Informatik in Saarbrücken. Please visit the LEDA homepage
Any commercial use of LEDA requires a commercial license which is
distributed by Algorithmic Solutions GmbH, Postfach 151101, 66041 Saarbrücken,
(fax: +49 681 842502, email: contact@algorithmic-solutions.de)