Invariant
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Invariant and invariance may have several meanings, among which are:
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Computer science
- Invariant (computer science), an expression whose value doesn't change during program execution
- Loop invariant, invariants used to prove properties of loops
- A data type in method overriding that is neither covariant nor contravariant
- Class invariant, invariants used to constrain objects of a class
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Mathematics
- Invariant (mathematics), something unaltered by a transformation, for example: taking a homotopy group functor on the category of topological spaces. Then, homeomorphic spaces have isomorphic fundamental group.
- Invariant (physics), meaning that something does not change under a transformation, such as from one reference frame to another
- The Invariant Society, the Oxford student mathematics society
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Other uses
- Invariant (linguistics), a word that does not undergo inflection
- Invariant (music)
- Writer invariant, property of a text which is similar in all texts of a given author, and different in texts of different authors
- Invariance (magazine), a French Communist journal
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