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  1. Invariant (mathematics) - Wikipedia

    • 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 and type of transformations are usually indicated by the context in which the term is used. For example, the area … See more

    Examples

    A simple example of invariance is expressed in our ability to count. For a finite set of objects of any kind, there is a … See more

    Invariant set

    A subset S of the domain U of a mapping T: U → U is an invariant set under the mapping when Note that the elements of S are not fixed, even though the set S is fixed in the power set of U. (Some authors use the terminolog… See more

    Formal statement

    The notion of invariance is formalized in three different ways in mathematics: via group actions, presentations, and deformation.
    Firstly, if one has a group G acting on a mathematic… See more

    Invariants in computer science

    In computer science, an invariant is a logical assertion that is always held to be true during a certain phase of execution of a computer program. For example, a loop invariant is a condition that is true at the beginning a… See more

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