For this survey talk I will bring a bestiary of algebraic structures that are often less well known than they deserve to be. As I will explain, these are all related to symmetries and topology, and they have interesting symmetries of their own. This observation leads to new homology computations, and those will be the results that I will present along the way. Part of this work is joint with N. Wahl.
Additional Information
Location: ESB 4133 (PIMS Lounge) Markus Szymik, NTNU Norwegian University of Science and Technology