A[Sl_q(2)] at roots of unity is a free module over A[Sl(2)]

preprint2000arXivOpen access

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.

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