Speaker: Andreas-Stephan Elsenhans (Bayreuth) Title: K3-surfaces and Picard groups Time & Place: 3:05-4pm, Thursday 3 March, Carslaw 535 Abstract: The most interesting invariant of a K3 surfaces is its Picard group. A method for the computation was introduced by van Luijk. In this talk I will present my work on improving and testing this method.