The conference will take place in lecture hall H31 in the maths department. Here is a map of the campus. Coffee breaks will take place across the corridor in room M102.
Get off at the bus stop "Universität" which is served by many bus lines. There should be signs pointing to the lecture hall. Check the bus schedules at the public transport organisation's website.
You can pay for a bus ride on entering the bus or purchase a strip of tickets ("Streifen-Ticket") from one of the ticket machines. A strip of tickets costs 10 Euros (12 if bought directly on the bus) and it allows five bus rides.