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Valuation-like maps and the congruence subgroup property

โœ Scribed by Andrei S. Rapinchuk; Yoav Segev


Publisher
Springer-Verlag
Year
2001
Tongue
English
Weight
321 KB
Volume
144
Category
Article
ISSN
0020-9910

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Fake Congruence Modular Curves and Subgr
โœ Gabriel Berger ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 164 KB

We construct a special class of noncongruence modular subgroups and curves, analogous in some ways to the usual congruence ones. The subgroups are obtained via the Burau representation, and the associated quotient curves have a natural moduli space interpretation. In fact, they are reduced Hurwitz s