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

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Del Zotto, Heckman, Meynet, Moscrop, Zhang, https://arxiv.org/abs/2201.08372

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

Choi, Córdova, Hsin, Lam, Shao, https://arxiv.org/abs/2204.09025