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arXiv:1401.1567 [math.GR]AbstractReferencesReviewsResources

Commutator subgroup of the Hecke group $G_5$ is not congruence

Cheng Lien Lang, Mong Lung Lang

Published 2014-01-08, updated 2014-01-16Version 2

We prove that the power subgroup $G_5^5$ and the commutator subgroup $G_5'$ of the Hecke group $G_5$ are not congruence.

Comments: Lemmas 3.5-3.7 are removed as they are not used in the proof of Prop. 5.2. arXiv admin note: text overlap with arXiv:1401.0775
Categories: math.GR
Subjects: 11F06
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