Approximating Novikov–Shubin numbers of virtually cyclic coverings
Holger Kammeyer
Karlsruhe Institute of Technology, Germany
Abstract
We assign real numbers to finite sheeted coverings of compact CW complexes designed as finite counterparts to the Novikov–Shubin numbers. We prove an approximation theorem in the case of virtually cyclic fundamental groups employing methods from Diophantine approximation.
Cite this article
Holger Kammeyer, Approximating Novikov–Shubin numbers of virtually cyclic coverings. Groups Geom. Dyn. 11 (2017), no. 4, pp. 1231–1251
DOI 10.4171/GGD/427