Welcome and Opening Remarks

          @misc{ scivideos_PIRSA:21020016,
            doi = {10.48660/21020016},
            url = {https://pirsa.org/21020016},
            author = {Krasnov, Kirill},
            keywords = {Mathematical physics, Particle Physics, Quantum Fields and Strings},
            language = {en},
            title = {Welcome and Opening Remarks},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2021},
            month = {feb},
            note = {PIRSA:21020016 see, \url{https://scivideos.org/pirsa/21020016}}
          }