Related papers: String amplitudes and the Penrose limit

This paper has been withdrawn by the author due to a serious mistake on Lemma 2.4.

Withdrawn due to extensions and submission as another paper.

This paper has been withdrawn by the authors due to a crucial error in calculation.

This paper has been withdrawn by the author due to errors.

This paper has been withdrawn.

This paper has been withdrawn by the authors; the main conclusion is incorrect, as some of the crucial calculations were not properly converged.

The paper was withdrawn because of its significant overlap with a paper appeared recently.

This paper has been withdrawn by the authors.

This paper has been withdrawn by the author: it was a too preliminary version

This paper has been withdrawn due to fundamental errors.

This paper has been withdrawn due to a crucial theoretical error.

This paper has been withdrawn by the authors due to errors in the X-ray diffraction data. Other measured data are not affected; however, the errors significantly change the interpretation and conclusions, and thus warrant withdrawal and…

This paper has been withdrawn by the authors.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author

This paper has been withdrawn by the author because overcame by arXiv:0910.4694

This paper has been withdrawn by the author due to some errors.

This paper has been withdrawn by the author, due a crucial error in the optimization. For the last one month I have been trying to remove the error, but it seems to take a lot of time so I decided to withdraw this paper for the moment.

This paper has been withdrawn by author due to an error in the proof.