This package provides a collection of algorithms for computing with finite-index subgroups of (P)SL(2,Z).
This package requires GAP version 4.5.3
The following other GAP packages are needed:
The following additional GAP packages are not required, but suggested:
This package was developed by
Luca Leon Junk. in the working group of Prof. Dr. Gabriela Weitze-Schmithüsen at Saarland University.
Please, cite this package as
[Jun20] Junk, L. L.,
ModularGroup, Finite-index subgroups of (P)SL(2,Integers),
(GAP package), https://le-on.github.io/ModularGroup.
You can get more info by typing
Cite("ModularGroup"); in the gap prompt.
For bug reports, feature requests and suggestions, please use the issue tracker.