User contributions for 82.123.174.158

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29 November 2014

  • 18:2618:26, 29 November 2014 diff hist +1,040‎ Group extension ‎ If an extension is equivalent to the trivial one, then it is a direct product. Prop 2 : http://books.google.fr/books?id=4RIDPH1ULXcC&pg=SA1-PA63#v=onepage&q&f=false current
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