Related papers: What we think about multiparticle amplitudes

The paper is withdrawn due to an error in Section 2.

The paper is being withdrawn. A new submission will follow.

This paper has been withdrawn.

The paper has been withdrawn by the authors

This paper has been withdrawn by the author.

This paper has been withdrawn since a trivial proof of the result has been pointed out to the author.

This paper has been withdrawn

This paper has been withdrawn by the author, due an error in the proof of Proposion 2.13.

This paper is withdrawn due to some gaps in the proof

This paper has been withdrawn by the authors due to some errors.

This paper has been withdrawn by the author because Conjecture 1 is false. Please see arXiv:0901.2093 for a justification that Conjecture 1 is false. The other main results are also available from the above URL.

This paper has been withdrawn by the authors due to a mistake in the proof of Theorem 1.

This paper has been withdrawn by the authors as requested by the journal.

This paper has been withdrawn by the author due to a mistake in the proof of the main theorem.

The paper has been withdrawn

The paper is withdrawn.

The paper is withdrawn by the authors and replaced be an improved and extended version arxiv: 0812.2968

This paper had been withdrawed

The paper has been withdrawn by the authors

This paper has been withdrawn by the author due to that the main results and approaches are closedly parallel to the ones in Lie algebra case.