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Nov 13, 2023 at 9:26 answer added XYC timeline score: 0
Jun 14, 2023 at 19:37 vote accept XYC
Jun 14, 2023 at 7:25 history edited XYC CC BY-SA 4.0
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Jun 14, 2023 at 7:20 comment added XYC @AndreasBlass oops. thx for pointing out. I didn't notice that.
Jun 14, 2023 at 3:59 history became hot network question
Jun 13, 2023 at 22:02 comment added Andreas Blass Your third $\mathbb Z/2$ example, with one open point and one closed, doesn't produce a topological group; addition is discontinuous.
Jun 13, 2023 at 20:25 answer added Dave Benson timeline score: 10
Jun 13, 2023 at 19:59 history asked XYC CC BY-SA 4.0