From March 15th to August 31st 200, I attended a research internship within the Comuter Science and Artificial Intelligence Laboratory at the Massachusetts Institute of Technology under the supervision of Nancy Lynch. Within her group, the Theory of Distributed Systems Group, I worked on the Tempo Toolset develloped by Veromod Inc. and on six examples for the Tempo Toolset User Guide and Refere...

We review recent developments in the theory of supermembranes and their relation to matrix models. Invited talk given at the 31st International Symposium Ahrenshoop on the Theory of Elementary Particles, Buckow, September 2 6, 1997 (to appear in Fortschritte der Physik) and at the CERN Theory Division, December 3, 1997. 1 Supersymmetric quantum mechanics Consider the class of supersymmetric Ham...

We show that a modification of the BRST lattice quantization allows to circumvent an old paradox, formulated by Neuberger, related to lattice Gribov copies and nonperturbative BRST invariance. In the continuum limit the usual BRST formulation is recovered. ⋆ Address until August 31st, 1998. ⋆⋆ Permanent address.