Related papers: Ambiguous ideal classes and ambiguous ideals

This paper has been withdrawn, as all conjectures (and one claim) have been proven incorrect.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.

This paper was withdrawn by the authors. Lemma 5.1 is wrong.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author due a few mistakes in the paper.

This paper has been withdrawn by the author, due to a significant error in section 4.3.1.

This paper has been withdrawn by the authors. Because of a misunderstanding, the paper was submitted prematurely to the arXiv. A replacement will follow.

This paper has been withdrawn.

The authors have withdrawn this paper.

The paper has been withdrawn.

This paper is withdrawn. We found a mistake in Lemma 4.1

This paper has been withdrawn by the author due to a crucial error.

This paper has been withdrawn by the authors. We have discovered an error in the evaluation of the diagram, which invalidates our conclusion.

This paper has been withdrawn by the authors. We have discovered an error in the evaluation of the diagram, which invalidates our conclusion.

This paper has been withdrawn by the author

This paper has been withdrawn by the author due to an erro thereon line -2 of page 4.

This paper has been withdrawn.

This paper was withdrawn (temporarily?) by the author since an error needs to be corrected.

This paper has been withdrawn, because it is subsumed by the new preprint arXiv:0806.4540 .

This paper has been withdrawn.

This paper has been withdrawn by the author(s)