SMRI Algebra and Geometry Online: ’Boundary conditions and hamiltonian actions in geometric Langlands’ David Ben-Zvi (University of Texas at Austin) Wednesday June 3, 11am-12:30pm (AEST) Abstract: I will discuss some of the structures suggested by the physics of supersymmetric gauge theory of relevance to the geometric Langlands program. The discussion will include defects of various dimensions in field theory, with an emphasis on the role of boundary conditions and how they lead to the suggestion of a duality between hamiltonian actions of Langlands dual groups. Please email smri.admin@sydney.edu.au to register. The Zoom password will be emailed to registered participants prior to the event. **Please note that the seminar will be recorded and uploaded to the SMRI YouTube channel** https://www.youtube.com/channel/UCNrre_3ROSz7FqOka3lSMVA https://mathematical-research-institute.sydney.edu.au/