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Congruence testing for odd subgroups of the modular group
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Hamilton, Thomas and Loeffler, David (2014) Congruence testing for odd subgroups of the modular group. LMS Journal of Computation and Mathematics, 17 (1). pp. 206-208. doi:10.1112/S1461157013000338 ISSN 1461-1570.
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Official URL: http://dx.doi.org/10.1112/S1461157013000338
Abstract
We give a computationally effective criterion for determining whether a finite-index subgroup of SL2(Z) is a congruence subgroup, extending earlier work of Hsu for subgroups of PSL2(Z).
Item Type: | Journal Article | ||||||||||
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Subjects: | Q Science > QA Mathematics | ||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Mathematics | ||||||||||
Library of Congress Subject Headings (LCSH): | Algebra, Abstract, Algebra, Modular groups | ||||||||||
Journal or Publication Title: | LMS Journal of Computation and Mathematics | ||||||||||
Publisher: | Cambridge University Press | ||||||||||
ISSN: | 1461-1570 | ||||||||||
Official Date: | 21 May 2014 | ||||||||||
Dates: |
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Volume: | 17 | ||||||||||
Number: | 1 | ||||||||||
Page Range: | pp. 206-208 | ||||||||||
DOI: | 10.1112/S1461157013000338 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||
Date of first compliant deposit: | 25 January 2016 | ||||||||||
Date of first compliant Open Access: | 25 January 2016 | ||||||||||
Open Access Version: |
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