Related papers: Wellposedness of hyperbolic evolution equations in…

The paper has been withdrawn.

This paper has been withdrawn because the part concerning the definition of global hyperbolicity has already been included in an expanded and clearer way in gr-qc/0611138. The remainder will be also extended and posted.

This paper has been withdrawn by the authors due to a likely hole in the proof.

This paper has been withdrawn by the author.

This paper has been withdrawn by the authors due to an error in Section 7.

This paper has been withdrawn, as all conjectures (and one claim) have been proven incorrect. Some of what remains may eventually reappear in a different context.

The paper was withdrawn because of its significant overlap with a paper appeared recently.

This paper has been withdrawn by the author, due to an error in Proposition 2.2.

This paper has been withdrawn by the author due to an error in an inequality in the proof of Theorem 1.1.

This paper has been withdrawn by the authors due to a crucial gap in the estimates for m>=4.

This paper has been withdrawn by the author(s), due a crucial error in Eqn. 30.

This paper is withdrawn because the results in the paper are included in a paper to be published in Mathematical and Computer Modelling.

This paper has been withdrawn by the author due to a crucial error in several equations.

This paper has been withdrawn by the author(s) due to the discussion was made on the basis of linear term merely, which is incomplete.

This paper has been withdrawn by the author due to a crucial sign error in equation 1

This paper has been withdrawn due to submission of subsequent versions as a new preprint

This paper has been withdrawn by the author due to that the main results and approaches are closedly parallel to the ones in Lie algebra case.

This paper has been withdrawn by the authors due to the existence of main results in the literature.

There have been gaps found in the proofs. The paper is withdrawn until further notice.

This paper has been withdrawn by the authors, due to a mistake pointed out by Lenny Ng and Josh Sabloff.