I believe that hyperbovine was referring to the article linked by tzs that explains the relation. http://arxiv.org/pdf/math/0008177v2 http://arxiv.org/pdf/math

I believe that hyperbovine was referring to the article linked by tzs that explains the relation. http://arxiv.org/pdf/math/0008177v2 http://arxiv.org/pdf/math/0008177v2