As in the previous years, we will have two invited speakers, one internal and one external one. They have been chosen by popular vote and are

- Professor Martina Juhnke-Kubitzke from the University of Osnabrück.
- Professor Olga Holtz from TU Berlin and

Martina Juhnke-Kubitzke is a Professor of Discrete Mathematics at the University of Osnabrück. She obtained her PhD from the Philipps-Universität Marburg/Lahn in 2009 under the supervision of Volkmar Welker. Before joining the University of Osnabrück, she has held positions as a postdoctoral researcher in Reykjavík (Háskólin í Reykjavík), Vienna (University of Vienna), and Frankfurt am Main (Goethe-Universität). Her research interests include algebraic and topological combinatorics, discrete and convex geometry, and real algebraic geometry.

**More information can be found on her webpage.**

Olga Holtz is a Professor of Mathematics at the University of California-Berkeley, a Professor of Applied Mathematics at the Technical University Berlin, and a member of the BMS faculty. She obtained her PhD in mathematics from the University of Wisconsin-Madison in 2000. Her advisor was Hans Schneider. In the past, she has been a postdoctoral researcher at the Computer Science Department at the University of Wisconsin-Madison, Humboldt fellow at the Institute of Mathematics of the Technical University Berlin, and assistant and associate professor at the University of California-Berkeley. Her research interests include classical and numerical analysis, matrix and operator theory, approximation theory, commutative algebra, analysis of algorithms and computational complexity. She is a recipient of the Sofja Kovalevskaja Award and the European Mathematical Society Prize, among others.

**For more information, visit her webpage at UC Berkeley or at TU Berlin .**