Related papers: On homology classes not representable by products

This paper has been withdrawn by the author; see the much expanded, improved, and generalized version at arXiv:0811.2080.

This paper has been withdrawn by arXiv administrators because of disputed claims of authorship among former collaborators

This paper has been withdrawn as it has been superseded by 0808.2697

This article has been withdrawn due to an error in a proof of the main result.

The results of this paper have been subsumed by those of our new paper arXiv:0910.1858

The paper has been withdrawn.

This paper has been withdrawn by the author due to journal requirement.

This paper has been withdrawn by the author.

This paper was withdrawn. It has been superseded by the latest version of hep-th/0107069.

The paper has been withdrawn by the author.

This paper has been withdrawn by the authors; it will be incorporated into part I of the series (in preparation).

This paper has been withdrawn, because I have merged it with paper I of the series, math.AG/0312190. The main results of this paper now appear in sections 7-9 of the revised version of math.AG/0312190, with shortened and improved proofs.

This paper has been withdrawn because of serious errors.

This paper has been withdrawn by the authors, and instead we have replaced hep-ph/9807214 by this new version.

This paper has been withdrawn by the author, because a better treatment is given in the author's Phd. thesis (Sections 3.4.6 and 4.4), now available on the arxiv.

This paper has been withdrawn by the author, due to possible counter-examples.

This paper has been withdrawn by the author.

This paper has been withdrawn because it has been by far superseded by the Author's post arXiv:1108.1306v6, which was published on 30/08/2011.

This paper has been withdrawn because the new one gr-qc/0512095 includes all its results (as well as those in gr-qc/0511016) in a clearer way.

This paper has been withdrawn by the author due to a crucial error in the definition of homomorphism.