Approximating $L^2$-invariants by their classical counterparts

Approximating $L^{2}$ -invariants by their classical counterparts

In this paper we discuss open problems concerning $L^{2}$ -invariants focusing on approximation by towers of finite coverings.

Wolfgang Lück, Approximating $L^{2}$ -invariants by their classical counterparts. EMS Surv. Math. Sci. 3 (2016), no. 2, pp. 269–344