Visit of Nelson Eiró, Aichen Li and Ruyong Li

Nelson Eiró visited Gr@v just before successfully defending his M.Sc. thesis on "Strong lensing of light and shadow of a Black Hole surrounded by a heavy accretion disk", at IST-Lisbon, supervised by C. Herdeiro and P. Cunha. This visit coincided with the beginning of a long term visit by Aichen and Ruyong Li, both graduates from Beijing University of Technology.