On a crystallographic quotient of the Picard group and the construction of noncongruence subgroups. (Q2736021)

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scientific article; zbMATH DE number 1637309
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English
On a crystallographic quotient of the Picard group and the construction of noncongruence subgroups.
scientific article; zbMATH DE number 1637309

    Statements

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    27 August 2001
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    Bianchi groups
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    Picard group
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    congruence subgroups
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    subgroups of finite index
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    On a crystallographic quotient of the Picard group and the construction of noncongruence subgroups. (English)
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