The group structure of the normalizer of Γ<inf>0</inf>(N) after Atkin-Lehner

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Abstract

We determine the group structure of the normalizer of Γ 0(N) in SL2(ℝ) modulo Γ0 (N). These results correct the Atkin-Lehner statement (Atkin and Lehner, 1970, Theorem 8). Copyright © Taylor & Francis Group, LLC.
Original languageEnglish
Pages (from-to)2160-2170
JournalCommunications in Algebra
Volume36
DOIs
Publication statusPublished - 1 Jun 2008

Keywords

  • Atkin-Lehner involutions
  • Normalizer of modular groups

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