Generalized symmetries often appear in the form of emergent symmetries in low energy effective descriptions of quantum many-body systems. Non-invertible symmetries are a particularly exotic class of generalized symmetries. in that they are implemented by transformations that do not form a group. Such symmetries appear in large families of gapless states of quantum matter and constrain... https://www.nacrack.com/quick-grab-Chainsaw-File-super-grab/