Related papers: Withrawn paper

This paper has been withdrawn by the authors due to an error in the main theorem.

This paper has been withdrawn by the authors, due a gap in the proof of the main Theorem.

This paper has been withdrawn by the authors due to an incorrect analysis.

This paper has been withdrawn by the author due to rewritting and skipping crucial sign errors.

This paper has been withdrawn by the author: it was a too preliminary version.

This paper has been withdrawn by the authors, due to a crucial error in beta functions.

this paper has been withdrawn by the author due to crucial type errors

This paper has been withdrawn by the author.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This paper is being withdrawn by the authors in order to correct some errors and also to introduce improved theoretical techniques.

This paper was withdrawn as it may have appeared elsewhere, although in a different form.

This paper has been withdrawn by the author.

Title: An unlikely result Authors: T.M. Other Comments: This paper has been withdrawn Abstract: This paper has been withdrawn by the author due to the fact that some of the results turned out to be known.

This paper has been withdrawn by the authors because the paper is largely revised and improved, and to appear in Mechanics Research Communications.

This paper has been withdrawn by the authors.

This paper has been withdrawn by the authors due to a likely hole in the proof.

This paper has been withdrawn at the author's request.

This paper has been withdrawn by the author due to a crucial sign error in equation 1.

This paper has been withdrawn by the author due to a crucial error in several equations.

This paper has been withdrawn by author due to an error in the proof.

This paper has been withdrawn by the author due to a crucial sign error in equation 1