scientific article

zbMATH Open0868.20040MaRDI QIDQ3126422

Ismail Naci Cangül

Publication date: 21 August 1997

Title of this publication is not available (Why is that?)

zbMATH Keywords

normal subgroupsHecke groupscongruence subgroupsdiscrete subgroups of \(\text{PSL}(2,\mathbb{R})\)

Mathematics Subject Classification ID

Subgroup theorems; subgroup growth (20E07) Structure of modular groups and generalizations; arithmetic groups (11F06) Fuchsian groups and their generalizations (group-theoretic aspects) (20H10)

Related Items (3)

Normal subgroups of Hecke groups \(H(\lambda)\). ⋮ The normalizer of the level \((2,2)\)-Heisenberg group ⋮ Title not available (Why is that?)

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