Normalizers of the congruence subgroups

of the Hecke group II

Authors:
Mong-Lung Lang and Ser-Peow Tan

Journal:
Proc. Amer. Math. Soc. **128** (2000), 2271-2280

MSC (1991):
Primary 11F06

DOI:
https://doi.org/10.1090/S0002-9939-00-05677-X

Published electronically:
February 25, 2000

MathSciNet review:
1712893

Full-text PDF

Abstract | References | Similar Articles | Additional Information

Abstract: Let . Let be an ideal of and let be the maximal ideal of such that . Then . In particular, if is square free, then is self-normalized in .

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Additional Information

**Mong-Lung Lang**

Affiliation:
Department of Mathematics, National University of Singapore, Singapore 119260, Republic of Singapore

Email:
matlml@math.nus.edu.sg

**Ser-Peow Tan**

Affiliation:
Department of Mathematics, National University of Singapore, Singapore 119260, Republic of Singapore

Email:
mattansp@nus.edu.sg

DOI:
https://doi.org/10.1090/S0002-9939-00-05677-X

Keywords:
Congruence subgroups,
Hecke groups

Received by editor(s):
September 25, 1998

Published electronically:
February 25, 2000

Communicated by:
Ronald M. Solomon

Article copyright:
© Copyright 2000
American Mathematical Society