Related papers: On Exceptional Collections on Grassmannians

This paper has been withdrawn by the author due a crucial error.

This paper has been withdrawn because the models on which it was based have undergone significant changes and improvements. A new paper with the same title, based on the improved models, is accepted for publication in MNRAS and is available…

The paper is withdrawn.

This paper has been withdrawn to address an omission. It will be resubmitted in the near future.

This paper has been withdrawn by the author; see the much expanded, improved, and generalized version at arXiv:0811.2080.

This paper has been withdrawn due to non-clearness of some technical points, as well as lack of a reasonable statement of quantization conjecture.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author.

This paper was withdrawn by the author due to an edition's rights

This paper has been superseded by math.AG/0510287 and withdrawn by the author.

This paper has been retracted, for obvious reasons.

This paper has been withdrawn by the author due to inconsistency of the considered working hypothesis.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.

This paper has been withdrawn by the author because of copyright reasons.

This paper has been withdrawn.

This paper has been withdrawn Abstract: This paper has been withdrawn by the author due to the publication.

This paper has been withdrawn by the author due to some error in the result

This paper has been withdrawn by arXiv administrators because of disputed claims of authorship among former collaborators

This paper has been withdrawn by the author. The paper has been accepted for publication in Communications on Pure and Applied Mathematics.

This paper has been withdrawn by the author, since some results of the paper have been already obtained in [J.~Lewandowski, Class. Quantum Grav. 9 (1992), no. 10, L147--L151.]

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