|WikiProject Mathematics||(Rated Start-class, Mid-priority)|
This article has been tagged as part of a large-scale clean-up project of multiple article copyright infringement. (See the investigation subpage) It will likely be deleted after one week unless it can be verified to be free of infringement. For legal reasons, Wikipedia cannot accept copyrighted text or images borrowed from other web sites or printed material; such additions must be deleted. Major contributions by contributors who have been verified to have violated copyright in multiple articles may be presumptively deleted in accordance with Wikipedia:Copyright violations.
Interested contributors are invited to help clarify the copyright status of this material or rewriting the article in original language at the temporary page linked from the article's face. Please see our guideline on non-free text for how to properly implement limited quotations of copyrighted text. --r.e.b. (talk) 02:45, 24 December 2009 (UTC)
Copyright problem removed
One or more portions of this article duplicated other source(s). The material was copied from: http://arxiv.org/PS_cache/math/pdf/0106/0106197v2.pdf. Infringing material has been rewritten or removed and must not be restored, unless it is duly released under a compatible license. (For more information, please see "using copyrighted works from others" if you are not the copyright holder of this material, or "donating copyrighted materials" if you are.) For legal reasons, we cannot accept copyrighted text or images borrowed from other web sites or published material; such additions will be deleted. Contributors may use copyrighted publications as a source of information, but not as a source of sentences or phrases. Accordingly, the material may be rewritten, but only if it does not infringe on the copyright of the original or plagiarize from that source. Please see our guideline on non-free text for how to properly implement limited quotations of copyrighted text. Wikipedia takes copyright violations very seriously, and persistent violators will be blocked from editing. While we appreciate contributions, we must require all contributors to understand and comply with these policies. Thank you. Moonriddengirl (talk) 16:47, 1 January 2010 (UTC)