3 papers
math.GT2025
Fenchel's conjecture on NEC groups
Emilio Bujalance, F. Javier Cirre, Marston D. E. Conder +1
A classical discovery known as Fenchel's conjecture and proved in the 1950s, shows that every co-compact Fuchsian group has a normal subgroup of finite index isomorphic to the…
math.AG2016
On Riemann Surfaces of genus g with 4g automorphisms
E. Bujalance, A. F. Costa, M. Izquierdo
We determine, for all genus the Riemann surfaces of genus with automorphisms. For or , this surfaces form a real Riemann surface $\mathcal…
math.AG2015
Automorphism Groups of Cyclic p-gonal Pseudo-real Riemann Surfaces
Emilio Bujalance, Antonio F. Costa
In this article we prove that the full automorphism group of a cyclic -gonal pseudo-real Riemann surface of genus is either a semidirect product or a cy…