An Arithmetic-Geometric Method in the Study of the Subgroups of the Modular Group
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Publication:3991549
DOI10.2307/2374900zbMath0758.11024OpenAlexW2042460932MaRDI QIDQ3991549
Publication date: 28 June 1992
Published in: American Journal of Mathematics (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.2307/2374900
convex polygonmodular groupfundamental domainspecial polygonFarey symbolgeneralized Farey sequencesubgroups with free system of generators
Generators, relations, and presentations of groups (20F05) Structure of modular groups and generalizations; arithmetic groups (11F06) Farey sequences; the sequences (1^k, 2^k, dots) (11B57)
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