Projective Modules Over Quantum Projective Line
Abstract
Taking a groupoid C*-algebra approach to the study of the quantum complex projective spaces ℙn(𝒯) constructed from the multipullback quantum spheres introduced by Hajac and collaborators, we analyze the structure of the C*-algebra C(ℙ1(𝒯)) realized as a concrete groupoid C*-algebra, and find its K-groups. Furthermore, after a complete classification of the unitary equivalence classes of projections or equivalently the isomorphism classes of finitely generated projective modules over the C*-algebra C(ℙ1(𝒯)), we identify those quantum principal U(1)-bundles introduced by Hajac and collaborators among the projections classified.