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even permutation

noun, Mathematics
1.
a permutation of a set of n elements, x 1 , x 2 , … xn, that leaves unchanged the product of all differences of the form (x ix j), where i is less than j.
Compare odd permutation.
Origin
1930-1935
1930-35
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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