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Apr 8, 2014 at 12:54 vote accept physicus
Apr 6, 2014 at 5:41 history edited Sergei CC BY-SA 3.0
added 307 characters in body
Apr 6, 2014 at 5:28 comment added András Bátkai @NeilStrickland: you are right, I will delete my comment. I wanted to express that I am not satisfied with this criptic answer, but choose the wrong option.
Apr 5, 2014 at 19:56 review Low quality posts
Apr 6, 2014 at 2:51
S Apr 5, 2014 at 19:22 review Late answers
Apr 5, 2014 at 19:54
S Apr 5, 2014 at 19:22 review First posts
Apr 5, 2014 at 19:22
Apr 5, 2014 at 19:18 comment added Todd Trimble Please consider writing out this elementary and very simple form in your answer, since the text books.google.com/… might not be easily accessible for all MO users. It would make for a better and more useful MO answer.
Apr 5, 2014 at 19:00 history answered Sergei CC BY-SA 3.0