The mod 2 cohomology rings of congruence subgroups in the Bianchi groups

Abstract : We provide new tools for the calculation of the torsion in the cohomology of congruence subgroups in the Bianchi groups : An algorithm for finding particularly useful fundamental domains, and an analysis of the equivariant spectral sequence combined with torsion subcomplex reduction. __________ With an appendix by Bui Anh Tuan and Sebastian Schönnenbeck
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https://hal.archives-ouvertes.fr/hal-01565065
Contributor : Alexander Rahm <>
Submitted on : Saturday, October 13, 2018 - 11:46:44 AM
Last modification on : Thursday, August 1, 2019 - 1:34:02 PM

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  • HAL Id : hal-01565065, version 2
  • ARXIV : 1707.06078

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Ethan Berkove, Grant Lakeland, Alexander Rahm. The mod 2 cohomology rings of congruence subgroups in the Bianchi groups. 2017. ⟨hal-01565065v2⟩

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