Quasi-regular Sasakian and K-contact structures on Smale-Barden manifolds

A. Cañas, V. Muñoz, M. Schütt +1

Smale-Barden manifolds are simply-connected closed 5-manifolds. It is an important and difficult question to decide when a Smale-Barden manifold admits a Sasakian or a K-contact st…