par Troessaert, Cédric 
Référence Bulletin of the Belgian Mathematical Society Simon Stevin, 14, 4, page (669-680)
Publication Publié, 2007-10
Référence Bulletin of the Belgian Mathematical Society Simon Stevin, 14, 4, page (669-680)
Publication Publié, 2007-10
Article révisé par les pairs
| Résumé : | We characterize the orbits of the principal congruence subgroup Γ(n) of GL2(ℤ) acting by fractional linear transformations on the real line. The characterization is in terms of congruence properties (mod n) of the numerators and denominators of the convergents of some number in a given orbit. |
