At the math department at KFU, Graz, May 2012.


Verleihung Preis Doctoral School an Christopher Frei, December 2011


Workshop on Tropical Geometry Oberwolfach, December 2007


ICRA XII Torun, PL, August 2007, Conference dinner, w. Karin Erdmann


BIRS Workshop on Algebraic Lie Theory, Banff, Canada, June 2007


Workshop on Tropical Geometry, Loughborough, UK, April 2007

---