Related papers: Riemannian Geometries

This paper has been withdrawn by the authors; its contents are superseded by that of hep-th/0105305 and hep-th/0212275.

This paper has been withdrawn by the author due to the appearence of enlarged version with one new author name more (hep-ph/0012293).

This paper is withdrawn by the authors.

This paper was withdrawn. It has been superseded by the latest version of hep-th/0107069.

This paper has been withdrawn.

This paper has been retracted.

This paper has been withdrawn by the author. The paper has been accepted for publication in Communications on Pure and Applied Mathematics.

This paper has been withdrawn

This paper has been withdrawn

This paper has been withdrawn by the authors

This paper has been withdrawn by the author due to an error in section 7. There is a new version: arXiv:1011.3352.

The paper has been withdrawn

This paper has been temporarily withdrawn by the author(s),

This paper has been withdrawn by the author due to new results to be added.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author for further modification.

The paper is withdrawn by the authors and replaced be an improved and extended version arxiv: 0812.2968

%auto-ignore This paper has been withdrawn by the authors.

This paper has been withdrawn by the author(s), due to a crucial error in eq. 6.

This paper has been withdrawn by the author due to new results to be added.