L2-invariants for sequences of lattices in Lie groups, 1. Introduction and Statement of the main results (Vorlektüre) 2. Claudius Kamp: Invariant Random Subgroups 3. Claudius Kamp: Large Injectivity Radius and BS Convergence 4. Claudius Kamp: IRS's in higher rank 5. Anton Deitmar: Benjamini-Schramm convergence for congruence lattices 6. Jan Feldmann: Spectral Approximation for locally convergent sequences of lattices 7. Julien Sessler: Heat Kernel estimates and hyperbolic manifolds 8. Julien Sessler: Growth of Torsion Literatur: Miklos Abert, Nicolas Bergeron, Ian Biringer, Tsachik Gelander, Nikolay Nikolov, Jean Raimbault, and Iddo Samet, On the growth of L2-invariants for sequences of lattices in Lie groups, Ann. of Math. (2) 185 (2017), no. 3, 711–790, DOI 10.4007/an- nals.2017.185.3.1.