Counting topologically invariant means on $L_{\infty }(G)$ and $VN(G)$ with ultrafilters

John Hopfensperger

In 1970, Chou showed there are $|{\mathbb{N}}^{\ast }|=2^{2^{\mathbb{N}}}$ topologically invariant means on $L_{\infty }(G)$ for any noncompact, $\sigma$-compact amenable group. Over the following…