Related papers: A Gr\"obner basis proof of the flat extension theo…

This paper has been withdrawn by the author due to inconsistency of the considered working hypothesis. The consistent treatment is presented in the last publications of the author.

Withdrawn by author - Superseded by arXiv:0910.5106 [math.FA].

This paper has been withdrawn by the author.

The paper has been withdrawn by the author due an error in the proof of Theorem 3.2.

In spaces of nonpositive curvature the existence of isometrically embedded flat (hyper)planes is often granted by apparently weaker conditions on large scales. We show that some such results remain valid for metric spaces with non-unique…

This paper has been withdrawn by the author due to a crucial error in Lemma 3.5.

This paper has been withdrawn by the authors due to a gap in the proof of the main result (in 5.3).

This paper has been withdrawn by the author due to a serious gap in the proof of the main theorem.

An elementary gap in the proof of corollary 2.2 was found, the claim in the first version of the paper is thus retracted.

The paper is withdrawn due to an error in Section 2.

Paper withdrawn. Replaced by by gr-qc/0212077 .

This paper has been withdrawn by the author due to serious error found in main argument.

This paper has been withdrawn by the author due to a crucial error.

The paper is being withdrawn.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

This paper has been withdrawn by the author, due to an error in the proof of lemma 7.4. However, numerical evidence strongly suggest that this lemma is true.

This paper is withdrawn because of an error in Lemma 3.1

Temporarly withdrawn. Larger version of this review is currently in preparation.

This paper has been withdrawn due to an incorrect analysis in Section 4.

This paper has been withdrawn

This paper has been withdrawn by the author due to some error in the result