Kostas Sfetsos is visiting the University of Sao Paulo, which is just south of Rio de Janeiro in Brazil, from 23rd May to the 5th June.  He is visiting the Institute of Physics, and he gave a talk on Monday 27th May in the seminar of the IFT/SAIFR (Institute for Theoretical Physics/South American Center for Fundamental Research).  The title of the talk was “Non-Abelian T-duality and AdS/CFT“. The visit is funded by an FAPESP grant.