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when toggle format what by license comment
May 19, 2020 at 2:39 vote accept athin
May 19, 2020 at 2:38 comment added athin Nicely done, this is a correct proof! :)
May 18, 2020 at 11:54 history edited Glorfindel CC BY-SA 4.0
added 60 characters in body
May 18, 2020 at 11:49 history answered Glorfindel CC BY-SA 4.0