Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The condition or quality of being unchanging; constancy.
  • noun The property of being mathematically invariant.

from The Century Dictionary.

  • noun In mathematics, the essential character of invariants; persistence after linear transformation.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Math.) The property of remaining invariable under prescribed or implied conditions.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun the property of being invariant

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the nature of a quantity or property or function that remains unchanged when a given transformation is applied to it
  • noun the quality of being resistant to variation

Etymologies

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Examples

  • Since a cell would be generated through an OOL process, would'nt having to presume the existence of one and the genome in it to refute the contention that a measure of genomic invariance is necessary, not be self-defeating?

    Another Protozoan and Front-Loading 2006

  • Since a cell would be generated through an OOL process, would'nt having to presume the existence of one and the genome in it to refute the contention that a measure of genomic invariance is necessary, not be self-defeating?

    Another Protozoan and Front-Loading 2006

  • This principle of time invariance is enshrined in Noether’s Theorem.

    The perpetual motion machine « Anglican Samizdat 2009

  • Considered formally, the admission of a coordinate system which is accelerated with respect to the original "inertial" coordinates means the admission of non-linear coordinate transformations, hence a mighty enlargement of the idea of invariance, i.e., the principle of relativity.

    Out Of My Later Years Einstein, Albert, 1879-1955 1950

  • In contrast, quantum theory depends on a more fundamental, non-local topological invariance which is well known to be free of metrical constraints.

    The Birdcage Nicki Pombier Berger 2009

  • They almost always break the Lorentz invariance which is always a huge problem because the Lorentz invariance is one of the key experimentally verified principles underlying modern science (special relativity is crucial in particle physics).

    The Reference Frame 2010

  • (1953, 149), and: “The feature which suggests reality is always some kind of invariance of a structure independent of the aspect, the projection” (149).

    Structural Realism Ladyman, James 2009

  • This is applicable for discrete and continuous symmetries (although no time reversal symmetries) that are associated with invariance under unitary transformations.

    Special Post: Noether’s First Theorem – Emmy Noether for Ada Lovelace Day 2010

  • There is, in fact, a most elegant generalization, in the context of quantum mechanics, which is applicable to all symmetries, discrete and continuous, that are associated with invariance under unitary transformations. [ref]

    Special Post: Noether’s First Theorem – Emmy Noether for Ada Lovelace Day 2010

  • Now suppose that our Lagrangian has a time-independent symmetry (we mean a symmetry as an invariance: something does not change under a set of transformations).

    Special Post: Noether’s First Theorem – Emmy Noether for Ada Lovelace Day 2010

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