Related papers: The M-Principal Graph of a Commutative Ring

This paper has been withdrawn by the author(s), due an error in the proof.

The paper has been withdrawn due to an error in the main theorem.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author due to similarity to Author's other paper

This paper has been withdrawn by the author

This paper has been withdrawn by the authors. It has been replaced by the papers: "Drawings of Planar Graphs with Few Slopes and Segments" (math/0606450) and "Graph Drawings with Few Slopes" (math/0606446).

The paper has been withdrawn by the author because the result obtained has been reported earlier by other authors.

This paper has been withdrawn by the author due to a crucial problem associated with Figs. 2 and 3.

The paper has been withdrawn

This paper has been withdrawn by the author

This paper has been withdrawn by the author(s), due a crucial sign error in conclusion .

This paper has been withdrawn. The authors realized that the obtained results were not new.

This paper has been withdrawn by the author because Lemma 3 is incorrect. This mistake is crucial in this paper.

This paper is wrong and is therefore withdrawn.

This paper has been withdrawn by the author.

The authors have withdrawn this paper.

This article has been withdrawn by the authors.

%auto-ignore This paper has been withdrawn by the author, due to a crucial error.

This paper has been withdrawn by the author due to the unsure solution to the Dyson-Schwinger equation.

%auto-ignore Paper has been withdrawn by the author.