72 citations · 1.2k across the 81 of their papers we have counts for
4 papers · 1 filter
Braided quantum SU(2) groups
Paweł Kasprzak, Ralf Meyer, Sutanu Roy +1
We construct a family of q-deformations of SU(2) for complex parameters q not equal to 0. For real q, the deformation coincides with Woronowicz' compact quantum SU_q(2) group. For…
Inverse semigroup actions on groupoids
Alcides Buss, Ralf Meyer
We define inverse semigroup actions on topological groupoids by partial equivalences. From such actions, we construct saturated Fell bundles over inverse semigroups and non-Hausdor…
Groupoids in categories with pretopology
Ralf Meyer, Chenchang Zhu
We survey the general theory of groupoids, groupoid actions, groupoid principal bundles, and various kinds of morphisms between groupoids in the framework of categories with pretop…
A more general method to classify up to equivariant KK-equivalence
Rasmus Bentmann, Ralf Meyer
Using a homological invariant together with an obstruction class in a certain Ext^2-group, we may classify objects in triangulated categories that have projective resolutions of le…