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Maximal nonparabolic subgroups of the modular group

โœ Scribed by J. L. Brenner; R. C. Lyndon


Publisher
Springer
Year
1983
Tongue
English
Weight
562 KB
Volume
263
Category
Article
ISSN
0025-5831

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โœ Mong Lung Lang ๐Ÿ“‚ Article ๐Ÿ“… 2002 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 132 KB

Let G be a subgroup of finite index of the modular group and let N G be the normaliser of G in PSL 2 . In this article, we give an algorithm that determines N G .

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We show that S n has at most n 6ร‚11+o(1) conjugacy classes of primitive maximal subgroups. This improves an n c log 3 n bound given by Babai. We conclude that the number of conjugacy classes of maximal subgroups of S n is of the form ( 12 +o(1))n. It also follows that, for large n, S n has less than