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Apr 26, 2012 at 23:28 comment added Steve D This is (essentially) theorem 3.6 in Passman's group ring book (just for a "paper" reference).
Apr 26, 2012 at 21:05 vote accept Ralph
Apr 26, 2012 at 21:05 comment added Ralph Many thanks for advising to Jennings' theorem.
Apr 26, 2012 at 20:42 history edited M T CC BY-SA 3.0
fij belong in G not in the Gamma-quotients
Apr 26, 2012 at 20:23 history answered M T CC BY-SA 3.0