Invariant and invariance may refer to:
Computer science
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Invariant (computer science)
In mathematics, an invariant is a property of a mathematical object (or a class of mathematical objects) which remains unchanged after operations or transformations of a certain type are applied to the objects. The particular class of objects ...
, an expression whose value doesn't change during program execution
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Loop invariant, a property of a program loop that is true before (and after) each iteration
* A data type in method overriding that is neither
covariant nor contravariant
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Class invariant
In computer programming, specifically object-oriented programming, a class invariant (or type invariant) is an invariant used for constraining objects of a class. Methods of the class should preserve the invariant. The class invariant constra ...
, an invariant used to constrain objects of a class
Physics, mathematics, and statistics
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Invariant (mathematics)
In mathematics, an invariant is a property of a mathematical object (or a class of mathematical objects) which remains unchanged after operations or transformations of a certain type are applied to the objects. The particular class of objec ...
, a property of a mathematical object that is not changed by a specific operation or transformation
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Rotational invariance, the property of function whose value does not change when arbitrary rotations are applied to its argument
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Scale invariance, a property of objects or laws that do not change if scales of length, energy, or other variables, are multiplied by a common factor
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Topological invariant
In topology and related areas of mathematics, a topological property or topological invariant is a property of a topological space that is invariant under homeomorphisms. Alternatively, a topological property is a proper class of topological space ...
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Invariant (physics), something does not change under a transformation, such as from one reference frame to another
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Invariant estimator in statistics
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Measurement invariance, a statistical property of measurement
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Oxford University Invariant Society, an Oxford student mathematics club
Other uses
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Invariant (linguistics), a word that does not undergo inflection
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Invariant (music)
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Writer invariant, property of a text which is similar in all texts of a given author, and different in texts of different authors
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''Invariance'' (magazine), a French Communist journal
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Invariances
''Invariances'' is a 2001 book by American philosopher Robert Nozick, his last book before his death in 2002.
Introduction
In the introduction, Nozick assumes "orthodox quantum mechanics" and draws inferences from it about indeterminism and nonl ...
'', a 2001 book by philosopher Robert Nozick
See also
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{{Disambiguation