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Higher Levels

  • Serge Lang
Part of the Grundlehren der mathematischen Wissenschaften book series (GL, volume 222)

Abstract

For the most part we have considered modular forms on SL2(Z). Incidentally in dealing with Hecke operators on such forms, we needed to pass to congruence subgroups. We want to return more systematically to modular forms on such subgroups. As already mentioned, there are three important such subgroups, which we called Γ0(N), Γ1(N) and Γ(N). We treat Γ1(N) in some detail as an example. By conjugation, one can reduce the theory on Γ(N) to that of Γ1(N).

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Copyright information

© Springer-Verlag Berlin Heidelberg 1976

Authors and Affiliations

  • Serge Lang
    • 1
  1. 1.Department of MathematicsYale UniversityNew HavenUSA

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