BEKKA-TYPE AMENABILITIES FOR UNITARY COREPRESENTATIONS OF LOCALLY COMPACT QUANTUM GROUPS.

In this short note, we further Ng's work by extending Bekka amenability and weak Bekka amenability to general locally compact quantum groups, and we generalize some of Ng's results to the general case. In particular, we show that a locally compact quantum group G is coamenable if and only if the contra-corepresentation of its fundamental multiplicative unitary WG is Bekka-amenable, and that G is amenable if and only if its dual quantum group's fundamental multiplicative unitary WĜ is weakly Bekka-amenable. [ABSTRACT FROM AUTHOR]