Related papers: Lower order eigenvalues of the biharmonic operator

This paper has been withdrawn.

This paper has been withdrawn by the author.

This paper has been withdrawn.

This paper has been withdrawn

This paper has been withdrawn by the author.

This submission has been withdrawn by the authors because it is a duplicate of arXiv:hep-ph/0611336. It was due to a technical submission error by the authors.

This paper has been withdrawn by the authors. It has been superseded by hep-th/0309154

This paper has been withdrawn by the author due to some mistakes

This paper has been withdrawn.

This paper has been withdrawn by the author.

This paper has been withdrawn.

This paper is wrong and is therefore withdrawn.

The paper is withdrawn by the author due to an oversimplified and misleading approach which was taken initially as a starting point.

This paper has been withdrawn because of serious errors.

This paper has been withdrawn by the author

This paper has been withdrawn.

The paper has been withdrawn.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author. It will be replaced, substantially modified, by sections of the author's completed PhD thesis.

This paper has been withdrawn, because of an error in the proof of the main Theorem