Invariant

Look up invariance, invariant, or invariants in Wiktionary, the free dictionary.

Invariant and invariance may refer to:

• Invariant (computer science), an expression whose value doesn't change during program execution
  • 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
• Class invariant, an invariant used to constrain objects of a class

• Invariant (mathematics), a property of a mathematical object that is not changed by a specific operation or transformation
  • Rotational invariance, the property of function whose value does not change when arbitrary rotations are applied to its argument
  • 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
  • Topological invariant
• Invariant (physics), something does not change under a transformation, such as from one reference frame to another
• Invariant estimator in statistics
• Measurement invariance, a statistical property of measurement
• Oxford University Invariant Society, an Oxford student mathematics club

• Invariant chain, a polypeptide which plays a critical role in antigen presentation
• 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
• Invariances, a 2001 book by philosopher Robert Nozick

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