- four-vector
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A vector in four-dimensional vector space, especially one having three spatial and one temporal dimensions
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Four-vector — In relativity, a four vector is a vector in a four dimensional real vector space, called Minkowski space. It differs from a vector in that it can be transformed by Lorentz transformations. The usage of the four vector name tacitly assumes that… … Wikipedia
four-vector — keturmatis vektorius statusas T sritis fizika atitikmenys: angl. four component vector; four vector vok. vierdimensionaler Vektor, m; Viervektor, m rus. четыре вектор, m; четырёхмерный вектор, m pranc. quadrivecteur, m; vecteur espace temps, m … Fizikos terminų žodynas
Four-velocity — In physics, in particular in special relativity and general relativity, the four velocity of an object is a four vector (vector in four dimensional spacetime) that replaces classical velocity (a three dimensional vector). It is chosen in such a… … Wikipedia
Four-momentum — In special relativity, four momentum is the generalization of the classical three dimensional momentum to four dimensional spacetime. Momentum is a vector in three dimensions; similarly four momentum is a four vector in spacetime. The… … Wikipedia
Four-acceleration — In special relativity, four acceleration is a four vector and is defined as the change in four velocity over the particle s proper time:: mathbf{A} =frac{dmathbf{U{d au}=left(gamma udotgamma u c,gamma u^2mathbf a+gamma udotgamma umathbf u… … Wikipedia
Four-force — In the special theory of relativity four force is a four vector that replaces the classical force; the four force is the four vector defined as the change in four momentum over the particle s own time::mathbf{F} = {dmathbf{P} over d au}.For a… … Wikipedia
Four-frequency — The four frequency of a photon is defined by :N^a = left( u, u mathbf{n} ight)where u is the photon s frequency and mathbf{n} is a unit vector in the direction of the photon s motion. The four frequency is always a null vector. Closely related to … Wikipedia
Four-current — Electromagnetism Electricity · … Wikipedia
four-component vector — keturmatis vektorius statusas T sritis fizika atitikmenys: angl. four component vector; four vector vok. vierdimensionaler Vektor, m; Viervektor, m rus. четыре вектор, m; четырёхмерный вектор, m pranc. quadrivecteur, m; vecteur espace temps, m … Fizikos terminų žodynas
Four-gradient — The four gradient is the four vector generalization of the gradient::partial alpha stackrel{mathrm{def{=} left(frac{1}{c} frac{partial}{partial t}, abla ight)and is sometimes also represented as D .The square of D is the four Laplacian, which is… … Wikipedia
