variational principle

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• Variational principle — A variational principle is a principle in physics which is expressed in terms of the calculus of variations. According to Cornelius Lanczos, any physical law which can be expressed as a variational principle describes an expression which is self… …   Wikipedia

• variational principle — variacinis principas statusas T sritis fizika atitikmenys: angl. variation principle; variational principle vok. Extremalprinzip, n; Variationsprinzip, n rus. вариационный принцип, m pranc. principe variationnel, m …   Fizikos terminų žodynas

• Luke's variational principle — In fluid dynamics, Luke s variational principle is a Lagrangian variational description of the motion of surface waves on a fluid with a free surface, under the action of gravity. This principle is named after J.C. Luke, who published it in 1967 …   Wikipedia

• Schwinger's variational principle — In Schwinger s variational approach to quantum field theory, introduced by Julian Schwinger, the quantum action is an operator. Although this approachis superficially different from the functional integral(path integral) where the action is a… …   Wikipedia

• Principle of least action — This article discusses the history of the principle of least action. For the application, please refer to action (physics). In physics, the principle of least action or more accurately principle of stationary action is a variational principle… …   Wikipedia

• Variational method (quantum mechanics) — The variational method is, in quantum mechanics, one way of finding approximations to the lowest energy eigenstate or ground state, and some excited states. The basis for this method is the variational principle. Introduction Suppose we are given …   Wikipedia

• Variational integrator — Variational integrators are numerical integrators for Hamiltonian systems derived from the Euler Lagrange equations of a discretized Hamilton s principle. Variational integrators are momentum preserving and symplectic.References* E. Hairer, C.… …   Wikipedia

• History of variational principles in physics — A variational principle in physics is an alternative method for determining the state or dynamics of a physical system, by identifying it as an extremum (minimum, maximum or saddle point) of a function or functional. This article describes the… …   Wikipedia

• Hamilton's principle — In physics, Hamilton s principle is William Rowan Hamilton s formulation of the principle of stationary action (see that article for historical formulations). It states that the dynamics of a physical system is determined by a variational problem …   Wikipedia

• Bernoulli's principle — This article is about Bernoulli s principle and Bernoulli s equation in fluid dynamics. For Bernoulli s Theorem (probability), see Law of large numbers. For an unrelated topic in ordinary differential equations, see Bernoulli differential… …   Wikipedia

• List of variational topics — This is a list of variational topics in from mathematics and physics. See calculus of variations for a general introduction.*Action (physics) *Brachistochrone curve *Calculus of variations *Catenoid *Cycloid *Dirichlet principle *Euler–Lagrange… …   Wikipedia