BMS "What is … ?" seminar posters

The "What is … ?" seminar is a student-led seminar associated with the Berlin Mathematical School (BMS) and its three universities Freie Universität Berlin, Humboldt-Universität zu Berlin and Technische Universität Berlin. The BMS MATH+ Friday colloquium consists of a presentation from a math faculty member, almost always from outside Berlin. The "What is … ?" seminar occurs immediately beforehand, in which a graduate student or postdoc speaker gives a more introductory talk about a topic directly related to the colloquium. 

The list of presentation titles, speakers, and other information can be found here. 

This seminar is not to be confused with the various other mathematical seminars of the same name, including the similar but unrelated OSU "What is … ?" seminar.