Lecture 4: Boundary Conditions and Extended Defects

          @misc{ scivideos_PIRSA:19060017,
            doi = {10.48660/19060017},
            url = {https://pirsa.org/19060017},
            author = {Gaiotto, Davide},
            keywords = {Mathematical physics},
            language = {en},
            title = {Lecture 4:  Boundary Conditions and Extended Defects},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2019},
            month = {jun},
            note = {PIRSA:19060017 see, \url{https://scivideos.org/index.php/pirsa/19060017}}
          }