see the beautiful cities of Erlangen and Nuernberg. Thanks to Juergen Winkler, Wei Xiang, Beate Winner, Claudia Günther, Friederike Zunke, Veit Rothhammer, Toda Tomohisa, Jasmin Fischbeck and all others I met during my visit.

Thank you for organizing such a productive meeting George Tofaris Maria Spillantini