Related papers: Combinatorial shifting and graded Betti numbers

This paper has been withdrawn because the content has been substantially improved in a later paper, arXiv:0806.1165.

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This paper has been withdrawn.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

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This paper has been withdrawn

This paper has been withdrawn by the author.

The paper has been withdrawn by change of content and some errors in the examples.

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The paper has been withdrawn due to a crucial error in section 3.

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This paper has been withdrawn by the author because there are some typos in proofs.

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This paper has been withdrawn by the author since the comments have been withdrawn.

This paper has been withdrawn by the authors

This paper was withdrawn. It has been superseded by the latest version of hep-th/0107069.

This paper has been withdrawn by the author(s) in the light of several other works available and due to a misunderstanding in the authorships.

This paper has been withdrawn by the author due to a sheaf-theoretic error, in the end of the proof of the main theorem.

This paper has been withdrawn by the author due to similarity to the author's other paper

The paper has been withdrawn by the author, due to it being fundamentally flawed. The author apologizes for any inconvenience it may have caused.