17 citations · 25 across the 3 of their papers we have counts for
3 papers
math.QA2008★ 8 cited
The Hochschild cohomology ring of the standard Podles quantum sphere
Ulrich Kraehmer
The cup and cap product in twisted Hochschild (co)homology is computed for the standard quantum 2-sphere and used to construct a cyclic 2-cocycle that represents the fundamental Ho…
math.QA2007★ 17 cited
Piecewise principal comodule algebras
Piotr M. Hajac, Ulrich Kraehmer, Rainer Matthes +1
A comodule algebra P over a Hopf algebra H with bijective antipode is called principal if the coaction of H is Galois and P is H-equivariantly projective (faithfully flat) over the…
math.QA2002
FRT-duals as Quantum Enveloping Algebras
Ulrich Kraehmer
The Hopf algebra generated by the l-functionals on the quantum double C_q[G] \bowtie C_q[G] is considered, where C_q[G] is the coordinate algebra of a standard quantum group and q…