Equivariant Fredholm modules for the full quantum flag manifold of $S{U}_q(3)$

Abstract

We introduce $C^{\ast }$-algebras associated to the foliation structure of a quantum flag manifold. We use these to construct $S{L}_q(3,\mathbb{C})$-equivariant Fredholm modules for the full quantum flag manifold $X_q=S{U}_q(3)/T$ of $S{U}_q(3)$, based on an analytical version of the Bernstein-Gelfand-Gelfand complex. As a consequence we deduce that the flag manifold $X_q$ satisfies Poincaré duality in equivariant $KK$-theory. Moreover, we show that the Baum-Connes conjecture with trivial coefficients holds for the discrete quantum group dual to $S{U}_q(3)$.

arXiv comment43 pages

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• On pseudodifferential operators on filtered and multifiltered manifolds