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Jun 13, 2023 at 15:11 vote accept Suzet
Jun 12, 2023 at 17:41 answer added Kenta Suzuki timeline score: 2
Jul 7, 2021 at 16:39 comment added Peter Humphries I think the key thing is that you can't choose $\chi$ to be any character on the centre; you need it to be self-dual too.
Jul 7, 2021 at 12:35 history asked Suzet CC BY-SA 4.0