Related papers: NP=PSPACE

This paper has been withdrawn by the author, due an error in the proof of Proposion 2.13.

This paper has been withdrawn by the author due to the unsure solution to the Dyson-Schwinger equation.

This paper has been withdrawn.

The paper has been withdrawn.

This paper has been withdrawn by the author due to a crucial error in several equations.

This paper has been withdrawn by the author(s), due a crucial error in Eqn. 30.

This paper has been withdrawn due to a photometric calibration error.

This paper has been withdrawn by the authors.

This paper has been withdrawn due to an error in section 3.

The authors have withdrawn this paper.

The paper has been withdrawn by the author due to a gap in Proof of Theorem 1.1.

This paper has been temporarily withdrawn for corrections.

This paper has been withdrawn by the author.

This paper has been withdrawn.

This paper has been withdrawn by the author. A revised version has been resubmitted to the archive.

This paper has been withdrawn by the author.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

This paper has been withdrawn by the author because eq.(4) and those subsequent are incorrect.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author.

This paper has been withdrawn. It was an early draft submitted prematurely in error. A complete version is to be submitted shortly.