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when toggle format what by license comment
Feb 10 at 1:55 comment added David White Steven Sivek gave this answer in 2009: mathoverflow.net/questions/3540/…
Dec 17, 2015 at 18:36 history edited Liviu Nicolaescu CC BY-SA 3.0
deleted 1 character in body
Dec 17, 2015 at 14:14 history answered Liviu Nicolaescu CC BY-SA 3.0