Related papers: On a wave map equation arising in general relativi…

This paper has been withdrawn by the author due to a crucial error.

This paper has been withdrawn by the author, due to an error in the proof of lemma 7.4. However, numerical evidence strongly suggest that this lemma is true.

This paper has been withdrawn by the author due to some problems.

This paper has been withdrawn by the author due to an error.

This submission has been withdrawn at the request of the author.

This paper has been withdrawn by the author, due to the insecurity against attacks received in quant-ph/0605027v5.

This paper has been withdrawn by the author due to that the main results and approaches are closedly parallel to the ones in Lie algebra case.

The paper has been withdrawn by change of content and some errors in the examples.

This paper has been withdrawn by the author due to essential mistakes in some previous versions.

This paper has been withdrawn by the author.

This paper has been withdrawn.

This paper has been withdrawn by the author and it is published in AGAG

This paper has been withdrawn by the authors. Significantly revised versions of the results of this paper are now available in arXiv:0707.0487v2 and arXiv:0808.3169v1.

This paper was withdrawn by the author. It turns out that similar ideas have been presented before. The author apologizes.

This paper has been withdrawn.

This paper has been withdrawn by the author.

This paper has been withdrawn.

This paper has been withdrawn

This paper has been withdrawn by the author.

This paper was withdrawn by the author.