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3 definitions found
 for invariant
From The Collaborative International Dictionary of English v.0.48 :

  Invariant \In*va"ri*ant\, n. (Math.)
     An invariable quantity; specifically, a function of the
     coefficients of one or more forms, which remains unaltered,
     when these undergo suitable linear transformations. --J. J.
     [1913 Webster]

From WordNet (r) 3.0 (2006) :

      adj 1: unaffected by a designated operation or transformation
      2: unvarying in nature; "maintained a constant temperature";
         "principles of unvarying validity" [syn: changeless,
         constant, invariant, unvarying]
      n 1: a feature (quantity or property or function) that remains
           unchanged when a particular transformation is applied to it

From The Free On-line Dictionary of Computing (30 December 2018) :

      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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