José Javier Etayo Gordejuela

The real genus of the alternating groups

A Klein surface with boundary of algebraic genus

The symmetric crosscap number of the families of groups DC3 × Cn and A4 × Cn

\mathfrak{p}\geq 2

On the minimum genus problem on bordered Klein surfaces

, has at most

Sobre grupos de automorfismos de superficies de Klein

12(\mathfrak{p}-1)

Abelian groups of automorphims of orientable bordered Klein surfaces of topological genus 2

automorphisms. The groups attaining this upper bound are called

A Alberto Aizpún y a sus compañeros de época, in memoriam

M^{\ast}

Efemérides: Julio Rey Pastor, 125 años

-groups, and the corresponding surfaces are said to have maximal symmetry. The

El género real de los grupos C2m ×Dn

M^{\ast}

Fuchsian groups generated by half-turns and geometrical characterization of hyperelliptic and symmetric Riemann surfaces

-groups are characterized by a partial presentation by generators and relators. The alternating groups

El lenguaje de las matemáticas

A_{n}