Tutorials:
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Survey lectures:
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Manfred Droste Dresden University of Technology Faculty of Mathematics and Natural Sciences Institute of Algebra D-01062 Dresden, Germany Tel.: +49-351-463-33908 Fax: +49-351-463-34235 E-Mail: droste@math.tu-dresden.de |
Heiko Vogler Dresden University of Technology Faculty of Computer Science Institute of Theoretical Computer Science D-01062 Dresden, Germany Tel.: +49-351-463-38232 Fax: +49-351-463-37959 E-Mail: vogler@inf.tu-dresden.de |
February 15, 2002/sg)