Related papers: Free algebras and the Freiheitssatz

The paper is withdrawn by the authors and replaced be an improved and extended version arxiv: 0812.2968

This paper has been withdrawn by the author [arXiv admin].

This paper has been retracted.

This paper has been withdrawn by the author due to the gaps in the proofs of Proposition 2.2 and Proposition 3.2

This paper has been withdrawn by the author due to some mistakes

After receiving useful peer comments, we would like to withdraw this paper.

This submission has been withdrawn at the request of the author.

This paper has been withdrawn by the author due a few mistakes in the paper.

This paper has been withdrawn while the author verifies the literature.

This paper has been withdrawn by the author.

This paper is withdrawn due to some gaps in the proof

The paper was withdrawn by the author. It contained various errors.

This paper has been withdrawn by the authors due to an error.

This paper has been withdrawn

This paper has been withdrawn by the author due to an error in the proof of Proposition 4.8.

The paper is being withdrawn. A new submission will follow.

This paper has been withdrawn by the authors due to some errors.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author due to incomplete interpretation for the results.

This paper is wrong and is therefore withdrawn.