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when toggle format what by license comment
Apr 10, 2018 at 13:26 comment added M.G. Very nice, intuitive argument!
Apr 10, 2018 at 3:21 history edited Wlod AA CC BY-SA 3.0
a typo
Apr 10, 2018 at 3:12 history answered Wlod AA CC BY-SA 3.0