Über die Spitzenbreiten von Kongruenzuntergruppen der rationalen Modulgruppe. (On the cusp amplitudes of congruence subgroups of the rational modular group)

DOI10.1007/BF02942319zbMath0707.11031OpenAlexW2078333108MaRDI QIDQ919386

Klaus Wohlfahrt

Publication date: 1989

Published in: Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1007/bf02942319

zbMATH Keywords

levelcusp amplitudescongruence subgroup of the classical modular group

Mathematics Subject Classification ID

Unimodular groups, congruence subgroups (group-theoretic aspects) (20H05) Structure of modular groups and generalizations; arithmetic groups (11F06)

Cites Work

• The cusp amplitudes of the congruence subgroups of the classical modular group
• An extension of F. Klein's level concept