Triangular Maps and Non-Congruence Subgroups of the Modular Group

DOI10.1112/blms/11.2.117zbMath0379.20043OpenAlexW1988838394MaRDI QIDQ4159540

Gareth A. Jones

Publication date: 1979

Published in: Bulletin of the London Mathematical Society (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1112/blms/11.2.117

zbMATH Keywords

NON-CONGRUENCE SUBGROUPS OF FINITE INDEX OF THE MODULAR GROUP

Mathematics Subject Classification ID

Unimodular groups, congruence subgroups (group-theoretic aspects) (20H05) Modular and automorphic functions (11F03) Fuchsian groups and their generalizations (group-theoretic aspects) (20H10) Linear algebraic groups over the reals, the complexes, the quaternions (20G20)

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