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math.AT2026
L^2-Betti numbers in prime characteristic and a conjecture of Wise
Grigori Avramidi, Wolfgang Lueck
We systematically study L^2-Betti numbers in zero and prime characteristic and apply them to a conjecture of Wise stating that all towers of a finite 2-complex are non-positive if…
math.AT2023
Some problems and conjectures about -invariants
Dominik Kirstein, Christian Kremer, Wolfgang Lueck
In this article we give a survey on open problems and conjectures concerning L^2-invariants. We cover the whole portfolio and not only certain aspects as they are considered in the…