solution stationnaire — nuostovusis sprendinys statusas T sritis fizika atitikmenys: angl. stationary solution; steady state solution vok. stationäre Lösung, f rus. стационарное решение, n pranc. solution stationnaire, f … Fizikos terminų žodynas
steady-state solution — nuostovusis sprendinys statusas T sritis fizika atitikmenys: angl. stationary solution; steady state solution vok. stationäre Lösung, f rus. стационарное решение, n pranc. solution stationnaire, f … Fizikos terminų žodynas
Electrovacuum solution — In general relativity, an electrovacuum solution (electrovacuum) is an exact solution of the Einstein field equation in which the only nongravitational mass energy present is the field energy of an electromagnetic field, which must satisfy the… … Wikipedia
Deriving the Schwarzschild solution — The Schwarzschild solution is one of the simplest and most useful solutions of the Einstein field equations (see general relativity). It describes spacetime in the vicinity of a non rotating massive spherically symmetric object. It is worthwhile… … Wikipedia
Vacuum solution (general relativity) — In general relativity, a vacuum solution is a Lorentzian manifold whose Einstein tensor vanishes identically. According to the Einstein field equation, this means that the stress energy tensor also vanishes identically, so that no matter or non… … Wikipedia
Reaction–diffusion system — Reaction–diffusion systems are mathematical models which explain how the concentration of one or more substances distributed in space changes under the influence of two processes: local chemical reactions in which the substances are transformed… … Wikipedia
Calculus of variations — is a field of mathematics that deals with extremizing functionals, as opposed to ordinary calculus which deals with functions. A functional is usually a mapping from a set of functions to the real numbers. Functionals are often formed as definite … Wikipedia
Ornstein–Uhlenbeck process — Not to be confused with Ornstein–Uhlenbeck operator. In mathematics, the Ornstein–Uhlenbeck process (named after Leonard Ornstein and George Eugene Uhlenbeck), is a stochastic process that, roughly speaking, describes the velocity of a massive… … Wikipedia
Derrick's theorem — is an argument due to a physicist G.H. Derrick which shows that stationary localized solutions to a nonlinear wave equation or nonlinear Klein–Gordon equation in dimensions three and higher are unstable. Contents 1 Original argument 2… … Wikipedia
Static universe — The idea of a static universe or Einstein s universe is one which demands that space is not expanding nor contracting but rather is dynamically stable. Albert Einstein proposed such a model as his preferred cosmology by adding a cosmological… … Wikipedia