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when toggle format what by license comment
May 26, 2022 at 12:44 comment added pfw Thank you, Ian! :)
May 26, 2022 at 12:11 comment added HenrikRüping By the way, each of the 3-ball inside $S^3$ looks a bit like a lense and thus it makes sense to pick the term "lens space" for the quotients.
May 26, 2022 at 10:45 history answered IJL CC BY-SA 4.0