noun, Mathematics.
the union of the relative complements of two sets.


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  • Symmetric-function

    noun, Mathematics. 1. a polynomial in several indeterminates that stays the same under any permutation of the indeterminates.

  • Symmetric-group

    noun, Mathematics. 1. the group of all permutations of a finite set.

  • Symmetric key cryptography

    cryptography A cryptography system in which both parties have the same encryption key, as in secret key cryptography. Opposite: public-key cryptography. (1998-06-09)

  • Symmetric lisp

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