The complete Postscript Version of this paper is also available locally. However to conserve disk space this version might be "staged" to tape.
N.B. You can find the full abstact of q-alg/9508003 at the arXiv Preprint server. - (German mirror).
The complete Postscript Version of this paper is also available locally. However to conserve disk space this version might be "staged" to tape.
N.B. You can find the full abstact of q-alg/9508018 at the arXiv Preprint server. - (German mirror).
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Martin Köhler, 27. September 1997.