<computer programming> A rule, such as the ordering of an ordered list or heap, that applies throughout the life of a data structure or procedure. Each change to the data structure must maintain the correctness of the invariant.

(01 Feb 1996)

invalidism, invA protein, invariable, invariance < Prev | Next > invariant, invariant chain

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<mathematics> An invariable quantity; specifically, a function of the coefficients of one or more forms, which remains unaltered, when these undergo suitable linear transformations.

(01 Mar 1998)