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This paper is withdrawn by the author. See math.GT/9811093 for replacement.
This paper has been withdrawn by the authors due to the paper is far from complishment.
This paper has been withdrawn by the author, because it is now part of an enlarged version entitled "Time functions as utilities" arXiv:0909.0890
This paper has been withdrawn by the authors, an improved version with the title "Exact Fermi coordinates for a class of spacetimes", arXiv:0912.2779, replaces it.
This paper has been withdrawn by the author due to the triviality of the considered coordinate transformations. A consistent treatment, based on the extended physical radial coordinate, is presented in the publications of the author 2000 -…
This paper has been withdrawn by Chien-Yu, Chen due to the authors fields error.
This paper has been removed by arXiv administrators because it overlaps gr-qc/0303034. This paper also has excessive overlap with the following paper also written by the authors or their collaborators: gr-qc/0606022, and others.
This paper has been withdrawn by the author; its content is properly cantained in the paper arXiv:0706.4447, entitled "Pure motives, mixed motives and extensions of motives associated to singular surfaces", and submitted on June 29, 2007.
This paper has been withdrawn by the authors due to a crucial error in the proof of the main result. In a new manuscript (with two new authors) available at arXiv:1010.2791v1 this problem has been resolved.
This paper has been withdrawn by the author. A much more revised version is available as arXiv:0909.4238.
This paper has been withdrawn by the authors.
This paper has been withdrawn.
This paper has been withdrawn by the author due to similarity to the author's other paper
This paper has been withdrawn by the authors, due to a crucial error.
The paper was withdrawn because of its significant overlap with a paper appeared recently.
This paper has been withdrawn by the authors, because the authors have second thought that the new ideas in this paper are better to be contained in another paper.
This paper is removed from the network permanently. The content in this paper has now been put together with hep-th/9310183. See the recently replaced and widely revised version of the latter.
The authors have withdrawn this article [arXiv admin].