Invariant star-products on S^2 and the canonical trace
arXiv:hep-th/0402031 · doi:10.1007/s11005-004-4290-7
Abstract
In the literature there are two different ways of describing an invariant star product on . We show that the products are actually the same. We also calculate the canonical trace and use the Fedosov-Nest-Tsygan index theorem to obtain the characteristic class of this product.
10 pages, LaTeX