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extremum principle

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  • Principle of minimum energy — The principle of minimum energy is essentially a restatement of the second law of thermodynamics. It states that for a closed system, with constant external parameters and entropy, the internal energy will decrease and approach a minimum value at …   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

  • Fermat's principle — In optics, Fermat s principle or the principle of least time is the idea that the path taken between two points by a ray of light is the path that can be traversed in the least time. This principle is sometimes taken as the definition of a ray of …   Wikipedia

  • Maupertuis' principle — In classical mechanics, Maupertuis principle (named after Pierre Louis Maupertuis) is an integral equation that determines the path followed by a physical system without specifying the time parameterization of that path. It is a special case of… …   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

  • Gauss' principle of least constraint — The principle of least constraint is another formulation of classical mechanics enunciated by Carl Friedrich Gauss in 1829.The principle of least constraint is a least squares principle stating that the true motion of a mechanical system of N… …   Wikipedia

  • Non-equilibrium thermodynamics — Thermodynamics …   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

  • 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

  • Extreme physical information — (EPI) is a principle, first described and formulated in 1998 Frieden, B. Roy Physics from Fisher Information: A Unification , 1st Ed. Cambridge University Press, ISBN 0 521 63167 X, pp328, 1998 ( [ref name= Frieden6 ] shows 2nd Ed.)] by B. Roy… …   Wikipedia

  • B. Roy Frieden — is a mathematical physicist living in Tucson, Arizona, in the United States. He is an Emeritus Professor of Optical Sciences at the University of Arizona. His main work is the use of Fisher information for purposes of deriving and developing… …   Wikipedia

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