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Proceedings of the American Mathematical Society

Published by the American Mathematical Society since 1950, Proceedings of the American Mathematical Society is devoted to shorter research articles in all areas of pure and applied mathematics.

ISSN 1088-6826 (online) ISSN 0002-9939 (print)

The 2020 MCQ for Proceedings of the American Mathematical Society is 0.85.

What is MCQ? The Mathematical Citation Quotient (MCQ) measures journal impact by looking at citations over a five-year period. Subscribers to MathSciNet may click through for more detailed information.

 

Normal subgroups of the modular group which are not congruence subgroups
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by Morris Newman PDF
Proc. Amer. Math. Soc. 16 (1965), 831-832 Request permission
References
  • Joseph Lehner, Discontinuous groups and automorphic functions, Mathematical Surveys, No. VIII, American Mathematical Society, Providence, R.I., 1964. MR 0164033
  • Morris Newman, A complete description of the normal subgroups of genus one of the modular group, Amer. J. Math. 86 (1964), 17–24. MR 163966, DOI 10.2307/2373033
  • Irving Reiner, Normal subgroups of the unimodular group, Illinois J. Math. 2 (1958), 142–144. MR 95881
  • Klaus Wohlfahrt, An extension of F. Klein’s level concept, Illinois J. Math. 8 (1964), 529–535. MR 167533
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Additional Information
  • © Copyright 1965 American Mathematical Society
  • Journal: Proc. Amer. Math. Soc. 16 (1965), 831-832
  • MSC: Primary 10.21
  • DOI: https://doi.org/10.1090/S0002-9939-1965-0181618-X
  • MathSciNet review: 0181618