Permutations by swapping: Difference between revisions

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_1 _2 _1 3</lang>
 
Alternatively, J defines [http://www.jsoftware.com/help/dictionary/dccapdot.htm C.!.2] as the parity of a permutation:
 
<lang J> (,.~C.!.2)<:| bfsjtn^:(i.!3) bfjt0 3
Retrieved from "https://rosettacode.org/wiki/Permutations_by_swapping"