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when toggle format what by license comment
Sep 3, 2015 at 18:30 history edited David Hill CC BY-SA 3.0
fixed typo
Sep 2, 2015 at 21:21 history edited darij grinberg CC BY-SA 3.0
more corrections & clarifications
Sep 2, 2015 at 19:15 history edited darij grinberg CC BY-SA 3.0
clarifying scope of i < n-1 assumption
Sep 2, 2015 at 18:48 history edited darij grinberg CC BY-SA 3.0
added 203 characters in body
Sep 2, 2015 at 17:55 comment added Duchamp Gérard H. E. Great ! and explicit (+1). One of my masters, A. Lascoux, used to tell the same proof !
Sep 2, 2015 at 17:37 history answered David Hill CC BY-SA 3.0