Geodesic
Approximating Novikov–Shubin numbers of virtually cyclic coverings
Holger Kammeyer1
1Karlsruhe Institute of Technology, Germany
Groups, geometry, and dynamics, Tome 11 (2017) no. 4, pp. 1231-1251

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DOI

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.
DOI : 10.4171/ggd/427
Classification : 58-XX, 35-XX, 55-XX
Mots-clés : L2-invariants, Novikov–Shubin, approximation

Holger Kammeyer  1

1 Karlsruhe Institute of Technology, Germany 
Holger Kammeyer. Approximating Novikov–Shubin numbers of virtually cyclic coverings. Groups, geometry, and dynamics, Tome 11 (2017) no. 4, pp. 1231-1251. doi: 10.4171/ggd/427
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     title = {Approximating {Novikov{\textendash}Shubin} numbers of virtually cyclic coverings},
     journal = {Groups, geometry, and dynamics},
     pages = {1231--1251},
     year = {2017},
     volume = {11},
     number = {4},
     doi = {10.4171/ggd/427},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/427/}
}
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