The Gysin Sequence for Quantum Lens Spaces

Abstract: We define quantum lens spaces as direct sums of line bundles' and exhibit them astotal spaces' of certain principal bundles over quantum projective spaces. For each of these quantum lens spaces we construct an analogue of the classical Gysin sequence in K-theory. We use the sequence to compute the K-theory of the quantum lens spaces, in particular to give explicit geometric representatives of their K-theory classes. These representatives are interpreted as line bundles' over quantum lens spaces and generically definetorsion classes'. We work out explicit examples of these classes.