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Dictionary

odd' permuta'tion

Math.
a permutation of a set of n elements, x₁, x₂, … , x_n, which permutes the product of all differences of the form (x_i–x_j), where i is less than j, into the negative of the product. Cf. even permutation.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

odd or even

odd-pinnate

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