On the 6d Origin of Non-invertible Symmetries in 4d

Del Zotto, García Etxebarria, Schäfer-Nameki, https://arxiv.org/abs/2203.10097

Kaidi, Ohmori, Zheng, https://arxiv.org/abs/2111.01141

Ohmori, Tizzano, https://arxiv.org/abs/2112.13445

Lee, Ohmori, Tachikawa. https://arxiv.org/abs/2108.05369