Definition: Generate permutations by transposing one pair of elements at a time.
Also known as Steinhaus-Johnson-Trotter.
Generalization (I am a kind of ...)
See also Fisher-Yates shuffle, Gray code.
Hale F. Trotter, Perm (Algorithm 115), CACM, 5(8):434-435, August 1962. Available at http://doi.acm.org/10.1145/368637.368660
Selmer M. Johnson, Generation of Permutations by Adjacent Transposition, Mathematics of Computation, 17(83):282-285, July 1963. Available at http://www.jstor.org/sici?sici=0025-5718(196307)17:83<282:GOPBAT>2.0.CO;2-E or http://www.jstor.org/action/showArticle?doi=10.2307/2003846
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Entry modified 2 March 2015.
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Paul E. Black, "Johnson-Trotter", in Dictionary of Algorithms and Data Structures [online], Vreda Pieterse and Paul E. Black, eds. 2 March 2015. (accessed TODAY) Available from: https://www.nist.gov/dads/HTML/johnsonTrotter.html