相关论文: Four manifolds with two-positive Ricci curvature

This paper has been withdrawn by the author due to a serious gap in the proof of the main theorem.

This paper was withdrawn by the author due to an edition's rights

This paper has been withdrawn by the author, due to an error in Proposition 2.2.

This paper has been withdrawn by the author due to serious error found in main argument.

This paper has been withdrawn by the author due to a critical error in the proof of Theorem A pointed out by Burkhard Wilking.

The paper has been withdrawn by the author due an error in the proof of Theorem 3.2.

This paper has been withdrawn by the author due to an error

This paper has been withdrawn by the author due to a crucial error in last part of proof.

This paper has been withdrawn by the author, due a crucial mistake in proof of lemma 4.2.

This paper has been withdrawn by the author due to an error in the proof of Proposition 4.8.

This paper has been withdrawn by the author, due to errors in Groebner basis calculations in the cases of five and six dimensional groups.

This paper has been withdrawn by the author due to an error in the proof.

This paper has been withdrawn by the authors due to a likely hole in the proof.

This paper has been withdrawn because of serious errors.

This paper has been withdrawn by the author due to a crucial error in equation (51).

This paper has been withdrawn. Its new version has been published.

This paper has been withdrawn by the author due to a mistake in the section 4.

This paper has been withdrawn by the author, due to a crucial error in the proof of Lemma 3.1.

This paper has been withdrawn by the author due to the gaps in the proofs of Proposition 2.2 and Proposition 3.2

This paper has been withdrawn by the author for further modification.