Uncountable Abelian Group C*-algebras Fail the Lifting Property

Abstract

In this note, we show that $C^{\ast }(G)$ fails the lifting property (LP) for every discrete group $G$ containing an uncountable abelian subgroup. Consequently, for every uncountable discrete abelian group $G$, the nuclear algebra $C^{\ast }(G)$ has the local lifting property (LLP) but fails the LP. This shows that the LP and the LLP do not coincide for full discrete group $C^{\ast }$-algebras.

7 pages, comments welcome