L2-Betti numbers for the universal covering of the circle (Ex)

Compute the $L^2$$<wikitex>; Compute the $L^2$-Betti numbers of the universal of covering of $S^1$ using the fact that the Murray-von Neumann dimension of the trivial Hilbert space is zero. </wikitex> [[Category:Exercises]] [[Category:Exercises without solution]]L^2$-Betti numbers of the universal of covering of $S^1$$S^1$ using the fact that the Murray-von Neumann dimension of the trivial Hilbert space is zero.