Related papers: Affine surfaces with isomorphic cylinders
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This paper has been withdrawn by the author due to its main result being included in cond-mat/0403309 by the same author.
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This paper has been withdrawn by the author, due to an error in Proposition 2.2.
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This paper has been withdrawn by the author, due to a significant error in section 4.3.1.
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This paper was withdrawn (temporarily?) by the author since an error needs to be corrected.
This paper has been withdrawn by the author due to a crucial errors.
None. This paper has been withdrawn by the authors.
This paper has been withdrawn by the authors.
This paper is withdrawn.
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The authors have withdrawn this article [arXiv admin].
This paper has been withdrawn by the authors.
This paper has been withdrawn.