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when toggle format what by license comment
Dec 12, 2018 at 22:54 history edited Michael Hardy CC BY-SA 4.0
added 1 character in body
Dec 7, 2018 at 15:52 comment added Gustave @fedja The $a$ is not necessarily positive.
Dec 6, 2018 at 22:16 comment added fedja Is your $a$ positive or not necessarily?
Dec 6, 2018 at 7:35 history asked Gustave CC BY-SA 4.0