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The paper was withdrawn because of its significant overlap with a paper appeared recently.

This paper has been withdrawn by the author due to incomplete interpretation for the results.

This paper has been withdrawn by the author due to similarity to the author's other paper

This paper has been withdrawn by the author due to similarity to Author's other paper

The paper has been withdrawn because the research work is still in progress.

This paper has been withdrawn.

This paper has been withdrawn by the author due to extremely unscientific errors.

This paper has been withdrawn by the authors due to an unlikely results.

A modified version of this paper is under process and with a new title and abstract. Hence, this version of the article is completely withdrawn.

This paper has been withdrawn by the authour.

This paper has been withdrawn. See published paper http://arxiv.org/math.HO/0512390

This paper has been withdrawn because of serious errors.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author, due to the insecurity against attacks received in quant-ph/0605027v5.

This paper has been withdrawn by the author(s), due to double submission. You can find it under: physics/0208019

This paper has been withdrawn.

This paper has been withdrawn by the author due to a error in attachment of source file.

The paper has been withdrawn by the authors

This paper has been withdrawn because the models on which it was based have undergone significant changes and improvements. A new paper with the same title, based on the improved models, is accepted for publication in MNRAS and is available…

This paper has been withdrawn by the authors