A[Sl_q(2)] at roots of unity is a free module over A[Sl(2)]
arXiv:math/0004092
Abstract
It is shown that when q is a primitive root of unity of order not equal to 2 mod 4, A(SL_q(2)) is a free module of finite rank over the coordinate ring of the classical group SL(2). An explicit set of generators is provided.
tex, 5 pages, final version accepted for publication on Lett. Math. Phys