Related papers: Dual Unification

This paper has been withdrawn by the author due to a crucial error.

This paper has been withdrawn

This paper has been withdrawn by the author.

This paper has been withdrawn since we combine this paper with math.AC/0503685. All contents of the paper have been moved to math.AC/0503685.

This paper has been withdrawn by the authors due to new experimental results.

This paper has been withdrawn by the authors.

This paper has been withdrawn by the author due to unspecified problems.

This paper has been withdrawn by the author due to its publication

This paper is withdrawn by the author. See math.GT/9811093 for replacement.

This paper has been withdrawn by the author(s),

This paper has been withdrawn because the content has been substantially improved in a later paper, arXiv:0806.1165.

This paper has been withdrawn by the author(s), due a crucial sign error in Thm. 11.

This paper has been withdrawn due to its publication

This paper has been withdrawn by the author due to essential mistakes in some previous versions.

The paper has been withdrawn by the author.

Withdrawn. Replaced by quant-ph/0308160 (cf accompanying txt file)

This submission has been withdrawn at the request of the author.

This paper has been withdrawn since it was an inadvertant double submission. An updated version of the original submission can be found at quant-ph/0505131

This paper is withdrawn. See quant-ph/9806031 for a discussion.

This paper has been withdrawn by the authors due to a crucial error in the proof of the main result. In a new manuscript (with two new authors) available at arXiv:1010.2791v1 this problem has been resolved.