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when toggle format what by license comment
Jun 19, 2023 at 20:39 history edited user378654 CC BY-SA 4.0
added 14 characters in body
Jun 19, 2023 at 20:38 comment added user378654 Yes, thank you!
Jun 19, 2023 at 10:10 comment added Giorgio Metafune Isn't $U_k=B_1 \setminus \cup_{m=1}^k B_{r_m}(2^{-m})$?
Jun 19, 2023 at 2:37 vote accept sorrymaker
Jun 19, 2023 at 1:38 history answered user378654 CC BY-SA 4.0