invariant transformation

См. также в других словарях:

• invariant — invariant, iante [ ɛ̃varjɑ̃, jɑ̃t ] adj. et n. m. • 1877; de 1. in et varier, par l angl. invariant (1851) ♦ Sc. Se dit d une grandeur, d une expression, d une relation ou d une propriété qui se conserve dans une transformation de nature physique …   Encyclopédie Universelle

• Invariant differential operators — appear often in mathematics and theoretical physics. There is no universal definition for them and the meaning of invariance may depend on the context. Usually, an invariant differential operator D is a map from some mathematical objects… …   Wikipedia

• Invariant — may have several meanings, among which are:* Invariant (computer science), an expression whose value doesn t change during program execution * In computer science, a type in overriding that is neither covariant nor contravariant * Invariant… …   Wikipedia

• Invariant theory — is a branch of abstract algebra that studies actions of groups on algebraic varieties from the point of view of their effect on functions. Classically, the theory dealt with the question of explicit description of polynomial functions that do not …   Wikipedia

• Transformation de mellin — En mathématiques, la transformation de Mellin est une transformation intégrale qui peut être considérée comme la version multiplicative de la transformation de Laplace bilatérale. Cette transformation intégrale est fortement reliée à la théorie… …   Wikipédia en Français

• invariant — [in ver′ē ənt] adj. not varying; constant; specif., having the nature of an invariant n. Math. an entity that is unchanged by a given transformation invariance n …   English World dictionary

• invariant — ► ADJECTIVE ▪ never changing. ► NOUN Mathematics ▪ a function which remains unchanged when a specified transformation is applied. DERIVATIVES invariance noun …   English terms dictionary

• Invariant estimator — In statistics, the concept of being an invariant estimator is a criterion that can be used to compare the properties of different estimators for the same quantity. It is a way of formalising the idea that an estimator should have certain… …   Wikipedia

• Invariant subspace — In mathematics, an invariant subspace of a linear mapping : T : V rarr; V from some vector space V to itself is a subspace W of V such that T ( W ) is contained in W . An invariant subspace of T is also said to be T invariant.If W is T invariant …   Wikipedia

• Invariant (mathematics) — In mathematics, an invariant is a property of a class of mathematical objects that remains unchanged when transformations of a certain type are applied to the objects. The particular class of objects and type of transformations are usually… …   Wikipedia

• Transformation affine — Application affine C’est Euler, en 1748, qui est à l’origine du terme « transformation affine », car dit il, « deux courbes images l’une de l’autre par une telle transformation présentent entre elles une certaine affinité ».… …   Wikipédia en Français