Sector estimates for Kleinian groups.
Some examples of discrete groups and hyperbolic orbifolds of infinite volume.
Some Remarks of Kleinian Groups.
Some remarks on non-discrete Möbius groups.
Some surface subgroups survive surgery.
Su una generazione del gruppo simplettico modulare di Siegel-Conforto
Subgroups of Finite Index of Fuchsian Groups.
Subgroups of Infinite Index in Fuchsian Groups.
Subgroups of the (2,3,7) Triangle Group.
Sur certains groupes fuchsiens et sur une extension de la théorie des formes quadratiques
Sur la détermination des fonctions qui admettent les substitutions d'un groupe donné, et seulement ces substitutions-là
Sur la fonction orbitale des groupes discrets en courbure négative
Nous précisons le comportement exponentiel de la fonction orbitale d'un quelconque groupe discret d'isométries en courbure négative.
Sur les notions de fonction complète et de fonction périodique
Sur les substitutions à une variable et les fonctions qu'elles laissent invariables
Surfaces réglées non compactes et groupes discrets.
Symmetries of planar growth functions.
Symmetry groups and fundamental tilings for the compact surface of genus . II: The normalizer diagram with classification.
Symplectic Representation of a Braid Group on 3-Sheeted Covers of the Riemann Sphere
We define Picard cycles on each smooth three-sheeted Galois cover C of the Riemann sphere. The moduli space of all these algebraic curves is a nice Shimura surface, namely a symmetric quotient of the projective plane uniformized by the complex two-dimensional unit ball. We show that all Picard cycles on C form a simple orbit of the Picard modular group of Eisenstein numbers. The proof uses a special surface classification in connection with the uniformization of a classical Picard-Fuchs system....
The box-counting dimension for geometrically finite Kleinian groups
We calculate the box-counting dimension of the limit set of a general geometrically finite Kleinian group. Using the 'global measure formula' for the Patterson measure and using an estimate on the horoball counting function we show that the Hausdorff dimension of the limit set is equal to both: the box-counting dimension and packing dimension of the limit set. Thus, by a result of Sullivan, we conclude that for a geometrically finite group these three different types of dimension coincide with the...
The connections between continued fraction representations of units and certain Hecke groups.