Resumen de On spines of Seifert fibered manifolds

Beatrice Ruini, Fulvia Spaggiari, Andrei Vesnin

• We define a family of balanced presentations of groups and prove that they correspond to spines of some Seifert fibered 3-manifolds. These presentations of groups (and manifolds) generalize in a natural way many classes of presentations of groups (and manifolds) previously studied by several authors. Moreover, we construct crystallizations representing the small Seifert manifolds of the considered class.