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invariant

   Also found in: Dictionary/thesaurus, Legal, Wikipedia, Hutchinson 0.01 sec.
invariant [in′ver·ē·ənt]
(mathematics)
An elementxof a setEis said to be invariant with respect to a groupGof mappings acting onEifg(x) =xfor allginG.
A subsetFof a setEis said to be invariant with respect to a groupGof mappings acting onEifg(x) is inFfor allxinFand allginG.
For an algebraic equation, an expression involving the coefficients that remains unchanged under a rotation or translation of the coordinate axes in the cartesian space whose coordinates are the unknown quantities.
(programming)invariant - 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.


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The general feasibility of this goal is supported by studies in animal models that show that immunologic activities directed against relatively invariant viral determinants can reduce illness and death.
Prospects for universal influenza virus vaccine by Zharikova, Darya / Emerging Infectious Diseases
One of the important benefits of the model is its ability to provide estimates of item difficulty and person abilities or attitudes that are relatively invariant over different samples (Green, 1996).
Teacher efficacy and academic performance by Cakiroglu, Erdinc / Academic Exchange Quarterly
These events have atypical hodographs as defined by B2K, resulting in values of SRH and other storm-relative parameters to be unrepresentative of supercell potential when the storm motion is estimated with non-Galilean invariant methods.
Operational forecasting of supercell motion: review and case studies ... by Bunkers, Matthew J. / National Weather Digest
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