相关论文: There are no projective surfaces in M_4

This paper has been withdrawn by the author due to a mistake in the section 4.

This paper has been withdrawn due to a crucial error in the proof of the main theorem

This paper has been withdrawn by the author due to a crucial error in the proofs. The error has been corrected and the paper has been expanded in arXiv:0910.5327

This paper is withdrawn by the authors.

This paper has been withdrawn by the author, due a crucial mistake in proof of lemma 4.2.

This paper has been withdrawn by the author due to the presented idea is wrong.

This paper has been withdrawn by the author due to a crucial mistakes.

This paper has been withdrawn by the author due to an error in the proof.

This paper has been withdrawn by the author because there are some typos in proofs.

This paper has been withdrawn by the author due to a crucial error.

This paper has been withdrawn.

This paper has been withdrawn.

This paper has been withdrawn by the author due to a crucial error in the submission action.

This paper was withdrawn by the author.

This paper has been withdrawn by the author due to a critical error in the proof of Theorem A pointed out by Burkhard Wilking.

The paper has been withdrawn.

This paper has been withdrawn by the author due to a errors in figure 3,4

This paper has been withdrawn by the author, due to obsolete reference [4], insufficient discussion in sec. 4, and major conceptual error in sec. 5.

This paper has been withdrawn by the authors due to some errors.

This paper has been withdrawn by the authors, because of serious experimental problems.