Related papers: Normal Surface Theory in Link Diagrams

The paper has been withdrawn by the author.

This paper has been withdrawn by author due to an error in the proof.

This paper has been withdrawn by the authors, due a crucial mistake in Lemma 2

This paper has been withdrawn by the author because eq.(4) and those subsequent are incorrect.

This paper has been withdrawn.

This paper was withdrawn as it may have appeared elsewhere, although in a different form.

This paper has been withdrawn.

This paper is being withdrawn because an error was discovered in lemma 4.3. Although the rest of the paper appears to be correct, this error invalidates the proof of theorem 3.1 and theorem 3.3.

This paper has been withdrawn by the authors as they feel it inappropriate to publish this paper for the time being.

Although the results are correct, it was pointed out that the results follow from some previously known results. Accordingly, this version of the paper is withdrawn by the authors.

This paper has been withdrawn.

This paper has been withdrawn by the author due to an error in an inequality in the proof of Theorem 1.1.

This paper has been withdrawn by the author to comply with the journal policy to which it has been submitted.

This paper has been withdrawn by the author due to an error.

This paper has been withdrawn

This paper has been withdrawn by the author.

This paper has been withdrawn by the authors

This paper has been withdrawn by the authors. It has been replaced by the papers: "Drawings of Planar Graphs with Few Slopes and Segments" (math/0606450) and "Graph Drawings with Few Slopes" (math/0606446).

This paper has been withdrawn.

This paper has been withdrawn by the author, because a better treatment is given in the author's Phd. thesis (Sections 3.4.6 and 4.4), now available on the arxiv.