In this talk, I will define the classical and non-classical of the wave equation.
Also, I will give some motivations about why low regularity scenarios are interesting.
Finally, I will focus on the classical ones and its relationship with Quantum Field Theory in spacetimes with limited regularity.
Links:
[1] https://www.mpim-bonn.mpg.de/taxonomy/term/39
[2] https://www.mpim-bonn.mpg.de/node/3444
[3] https://www.mpim-bonn.mpg.de/node/8825