Related papers: Spontaneous Lorentz symmetry breaking and cosmolog…

This paper has been withdrawn by the authors due to new available results. A revised version, that incorporates the new results, will be submitted later.

This article has been withdrawn due to an error in a proof of the main result.

This paper has been withdrawn by the author due to the unsure solutions to the Dyson-Schwinger equation.

This paper has been withdrawn by the author for further investigation.

This paper has been withdrawn by the author due to a crucial error.

This paper has been withdrawn due to a photometric calibration error.

This paper has been withdrawn by the authors. Because of a misunderstanding, the paper was submitted prematurely to the arXiv. A replacement will follow.

The paper has bene withdrawn by the author.

This paper was withdrawn by the authors because it has been supplanted by gr-qc/0311007 and gr-qc/0311038.

This paper has been withdrawn by the author(s), due a crucial sign error in conclusion .

This paper has been withdrawn by the authors.

This paper has been withdrawn by the author due to a new work in [arXiv:0901.0456v4] which can contain the results in this paper.

This paper has been withdrawn by Wenji Deng (e-mail: [email protected]) for further modification at Oct. 12, 1998. {PACS: 03.75.Fi, 05.30.Jp.64.60.-i, 32.80.Pj}

This paper has been withdrawn by the author because has been send to other journal.

The paper has been withdrawn

This paper has been withdrawn

This paper has been withdrawn by the author due to a crucial sign error in equation 1.

This paper has been withdrawn.

This paper has been withdrawn by the author. There is an error on page 3 in the last inequality before Lemma 1.1.

The paper is withdrawn by the author because it is superseded by cond-mat/0303357 .