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Noun: invariance  in'veh-ree-un(t)s
  1. The quality of being resistant to variation
    - invariability, invariableness
  2. (mathematics) the nature of a quantity, property or function that remains unchanged when a given transformation is applied to it
    "the invariance of the configuration under translation"

Derived forms: invariances

Type of: changelessness, constancy, stability, unchangeability, unchangeableness, unchangingness

Encyclopedia: Invariance