Geodesic
Independent generators for congruence subgroups of Hecke groups.
Mathematische Zeitschrift, Tome 220 (1995) no. 1, pp. 569-594.

Voir la notice de l'article provenant de la source European Digital Mathematics Library

Mots-clés : independent generators, congruence subgroups of Hecke groups, fundamental polygons, Farey symbols, free products 
@article{MZ_1995__220_1_174827,
     author = {M.-L. Lang and C.-H. Lim and S.-P. Tan},
     title = {Independent generators for congruence subgroups of {Hecke} groups.},
     journal = {Mathematische Zeitschrift},
     pages = {569--594},
     publisher = {mathdoc},
     volume = {220},
     number = {1},
     year = {1995},
     zbl = {0845.11017},
     url = {http://geodesic.mathdoc.fr/item/MZ_1995__220_1_174827/}
}
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M.-L. Lang; C.-H. Lim; S.-P. Tan. Independent generators for congruence subgroups of Hecke groups.. Mathematische Zeitschrift, Tome 220 (1995) no. 1, pp. 569-594. http://geodesic.mathdoc.fr/item/MZ_1995__220_1_174827/