Fibre product approach to index pairings for the generic Hopf fibration of SUq(2)

A fibre product construction is used to give a description of quantum line bundles over the generic Podleś spheres by gluing two quantum discs along their boundaries. Representatives of the corresponding K0classes are given in terms of 1-dimensional projections belonging to the C*-algebra, and in terms of analogues of the classical Bott projections. The K0-classes of quantum line bundles derived from the generic Hopf fibration of quantum SU(2) are determined and the index pairing is computed. It is argued that taking the projections obtained from the fibre product construction yields a significant simplification of earlier index computations. Mathematics Subject Classifications (2000): 46L80, 46L85, 58B32