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when toggle format what by license comment
May 26, 2018 at 11:17 comment added fedja No. The span may be the entire space for any subsequence. See the construction in mathoverflow.net/questions/297816/…
May 26, 2018 at 11:11 history edited Martin Sleziak CC BY-SA 4.0
minor typo
May 26, 2018 at 11:02 history asked Matey Math CC BY-SA 4.0