On March 16, Peter Bürgisser will give an invited talk at the 38th International Symposium on Theoretical Aspects of Computer Science. He will speak about Optimization, Complexity and Invariant Theory, based on recent research with Cole Franks, Ankit Garg, Rafael Oliveira, Michael Walter and Avi Wigderson. The corresponding extended abstract / survey article is publicly available at the Dagstuhl Publication Server.