The Normalizer Of Certain Modular Subgroups
Introduction. Let G denote the multiplicative group of matriceswhere a, b, c, d are integers and ad — bc = 1. G is one of the well-known modular groups. Let G0(n) denote the subgroup of G characterized by c ≡ 0 (mod n), where n is a positive integer. In this note we determine the normalizer of G0(n) in G, denoted by .
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1961 ◽
Vol 5
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pp. 35-40
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1955 ◽
Vol 7
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pp. 347-357
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1968 ◽
Vol 9
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pp. 146-151
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1953 ◽
Vol 1
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pp. 119-120
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1963 ◽
Vol 6
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pp. 70-74
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1964 ◽
Vol 16
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pp. 94-97
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1977 ◽
Vol 29
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pp. 169-179
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1949 ◽
Vol 1
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pp. 48-56
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1966 ◽
Vol 18
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pp. 621-628
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