This workshop series, jointly organized by the research groups 'Applied Analysis' at TU Braunschweig (Prof. Volker Bach), 'Mathematical Physics' at FSU Jena (Prof. David Hasler) and 'Mathematical Physics of Complex Quantum Systems' at Universität Paderborn (Dr. Benjamin Hinrichs), takes place every semester at one of the participating universities. The variety of covered topics ranges from Schrödinger operators, via problems in quantum information and many body theory, to quantum field theories.