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Mathematics of Computation

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Congruence subgroups of the modular group

Author: Morris Newman
Journal: Math. Comp. 29 (1975), 207-213
MSC: Primary 10D05; Secondary 20H05
MathSciNet review: 0371820
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Abstract: The congruence subgroups of the classical modular group which can be defined as the automorphs modulo q of some fixed matrix are studied, and their genera determined.

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Keywords: Automorphs, elliptic classes, finite fields, genus, modular group, natural homomorphism, parabolic classes
Article copyright: © Copyright 1975 American Mathematical Society

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