Related papers: String amplitudes and the Penrose limit

The paper is withdrawn because we realized triviality of the main considered example. Less trivial examples are provided in other our papers on the subject.

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The paper is withdrawn. The proof has an error and it requires a different approach.

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The paper has been withdrawn by the author, due to it being fundamentally flawed. The author apologizes for any inconvenience it may have caused.

This paper has been withdrawn by the author due to a crucial error.

This paper has been withdrawn by the author due to similarity to Author's other paper

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This paper has been withdrawn by the author due to an error estimate in Lemma 3.1.

This paper has been withdrawn by the authors due to an incorrect analysis.

This paper has been withdrawn by the author due to a crucial error in the submission action.

The paper has been withdrawn by the author due to a crucial error.

This paper has been withdrawn Abstract: This paper has been withdrawn by the author due to the publication.

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This paper has been withdrawn by the authors due to some fatal errors in the analysis.