Invariant 136392 211433203 2008-05-10T09:12:34Z 24.248.9.194 {{Wiktionarypar|invariant}} '''Invariant''' may have several meanings, among which are: * [[Invariant (computer science)]], an [[expression (programming)|expression]] whose value doesn't change during [[execution (computers)|program execution]] * In computer science, a [[datatype|type]] in [[Method overriding (programming)|overriding]] that is neither [[covariance and contravariance (computer science)|covariant nor contravariant]] * [[Invariant (mathematics)]], something unaltered by a [[transformation (mathematics)|transformation]], for example: taking a [[homotopy group]] [[functor]] on the [[Category (topology)|category]] of [[topological space]]s. Then, [[homeomorphic|homomeomorphic]] spaces have [[isomorphic]] [[fundamental group]]. See [[topological invariant]]. * [[Invariant (music)]] * [[Invariant (physics)]], meaning that something does not change under a transformation, such as from one [[reference frame]] to another * [[Writer invariant]], property of a text which is similar in all texts of a given author, and different in texts of different authors. * [[Invariant Point (physics)]], A unique condition of temperature, pressure and concentration in a system, which allows a number of phases to coexist in equilibrium. * [[Invariant representation (cognitive science)]], the form or essence of something, an abstraction from particulars * [[Oxford University Invariant Society|The Invariant Society]], the undergraduate mathematical society of Oxford University {{disambig}} [[cs:Invariant]] [[de:Invariante]] [[it:Invarianza]] [[pl:Niezmiennik]]