3 citations · 3 across the 2 of their papers we have counts for
6 papers · 1 filter
Invariant ideals of twisted crossed products
Chi-Wai Leung, Chi-Keung Ng
We prove a result concerning the inclusion of non-trivial invariant ideals inside non-trivial ideals of a twisted crossed product. We will also give results concerning the primenes…
Duality of Hopf -algebras
Chi-Keung Ng
In this paper, we study the duality theory of Hopf -algebras in a general ``Hilbert-space-free'' framework. Our particular interests are the ``full duality'' and the ``reduced…
Cohomology of Hopf -algebras and Hopf von Neumann algebras
Chi-Keung Ng
In this article, we will define two canonical cohomology theories for Hopf -algebras and for Hopf von Neumann algebras (with coefficients in their bicomodules). We will then s…
Examples of Amenable Kac system
Chi-Keung Ng
By giving an interesting characterisation of amenable multiplicative unitaries in term of one dimensional representations, we show in a simple way that bicrossproducts of amenable…
Approximation property of -algebraic Bundles
Ruy Exel, Chi-Keung Ng
In this paper, we will define the reduced cross-sectional -algebras of -algebraic bundles over locally compact groups and show that if a -algebraic bundle has the ap…
Amenability of Hopf C^*-algebras
Chi-Keung Ng
Three natural definitions for amenability of general Hopf C^*-algebras (all of them being generalizations of the case of locally compact groups) were given and the relations betwee…