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Oct 8, 2013 at 7:18 history edited Günter Rote CC BY-SA 3.0
small clarification
Apr 28, 2013 at 22:50 history edited Günter Rote CC BY-SA 3.0
corrected info about the sign
Apr 28, 2013 at 22:46 comment added Günter Rote Yes, it is. I have updated my answer.
Apr 26, 2013 at 22:25 comment added Victor Miller @Gunter: not all the coefficients are positive, so that we need to add a sign to $2^k$ -- is it the sign of the permutation?
Apr 26, 2013 at 22:23 comment added Victor Miller @Gunter: thank you for a clear a lucid explanation.
Apr 26, 2013 at 22:22 vote accept Victor Miller
Apr 26, 2013 at 22:13 history answered Günter Rote CC BY-SA 3.0