Congruence

Congruence subgroups of SL(2,Integers)

Version 1.2.3
Released 2019-05-19

This project is maintained by Ann Dooms, Alexander Konovalov, Helena Verrill

GAP Package Congruence

The Congruence package provides functions to construct several types of canonical congruence subgroups in SL_2(Z), and also intersections of a finite number of such subgroups. Furthermore, it implements the algorithm for generating Farey symbols for congruence subgroups and using them to produce a system of independent generators for these subgroups

The current version of this package is version 1.2.3, released on 2019-05-19. For more information, please refer to the package manual. There is also a README file.

Dependencies

This package requires GAP version >=4.8

The following other GAP packages are needed:

Authors

Ann Dooms, Eric Jespers, Alexander Konovalov, Helena Verrill.

Feedback

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