Junior Research Groups To strengthen the support for excellent young researchers and to give them a head start in building their own research profile within the supportive environment of a large center, ECMath is funding three positions for heads of Junior research Groups in application driven mathematical research. The group leaders are also part of the BMS Postdoctoral Faculty. Optimization under Uncertainty PI: Dr. Max Klimm Technische Universität Berlin Institute for Mathematics Straße des 17. Juni 136 D-10623 Berlin, Germany Phone: +49 (0)30 314 29400 Fax: +49 (0)30 314 25191 email: klimm(at)math.tu-berlin.de Infrastructure networks, e.g., for traffic, public transport, energy supply and communication, are a key factor for life quality, regional development and economic growth. The decisions on how to construct and operate these networks have a long-term impact on society and economy and, thus, call for a sound planning. On the other hand, designing future-proof infrastructures comes with various types of uncertainties. First, future demand for the service is unknown and can only be estimated. Second, most infrastructure networks are used by several independent parties that optimize their own well-being rather than the overall network performance. The latter effect becomes apparent in traffic networks where each driver seeks to take a shortest route regardless of the impact on other drivers. To cope with both the uncertainty in demands and user behavior, we develop new techniques for robust network optimization under user equilibrium constraints.