Related papers: Spacetime Foliations and p-Brane Dynamics

The paper has been withdrawn by the author.

Major mistake. The paper has been withdrawn.

This paper has been withdrawn due to a crucial theoretical and experimental error.

This paper has been withdrawn by the authors due to need of essential revision.

This paper has been withdrawn by the author due to a misunderstanding about 3QBF.

This paper has been withdrawn by the author

This paper has been withdrawn by the authors, as it has been rejected in October 2007.

This paper has been withdrawn by the author due to essential mistakes in some previous versions.

The paper is withdrawn.

This paper has been withdrawn by the author.

This paper has been withdrawn by the authors.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This paper was withdrawn by the author.

This paper has been withdrawn.

This paper has been withdrawn by the authors, due to an accuracy error in the Maple and Fortran calculations which completely changed the results.

The paper has been withdrawn by the author.

This paper is withdrawn.

This paper has been withdrawn.

The authors have withdrawn this paper.

The author has withdrawn this submission.

This paper has been withdrawn by the author due to the gaps in the proofs of Proposition 2.2 and Proposition 3.2