PodleÅ' Quantum Sphere: Dual Coalgebra and Classification of Covariant First Order Differential Calculus
arXiv:math/0204264
Abstract
The dual coalgebra of PodleÅ' quantum sphere O_q(S^2_c) is determined explicitly. This result is used to classify all finite dimensional covariant first order differential calculi over O_q(S^2_c) for all but exceptional values of the parameter c.
LaTeX2e, 19 pages