translate English to German: On 07 September 2009 I have delivered a talk at CALCO on my work with Yde Venema on the complementation of coalgebra automata from my visit last year.
Am 7. September 2009 habe ich meinen Vortrag ueber das Komplementierungslemma fuer Koalgebraautomaten im Rahmen der CALCO Konferenz 2009 in Udine gehalten.