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first order

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  • First-order — First or der, a. decaying at an exponential rate; a mathematical concept applied to various types of decay, such as radioactivity and chemical reactions. Note: In first order decay, the amount of material decaying in a given period of time is… …   The Collaborative International Dictionary of English

  • first-order — adjective 1》 most fundamental; primary. 2》 denoting mathematical equations involving only the first power of the independent variable or only the first derivative of a function …   English new terms dictionary

  • first-order — adjective Describing the simplest of many models, languages, relationship, forms of logical discourse etc, or the first in a numerical sequence of such things …   Wiktionary

  • first-order — …   Useful english dictionary

  • First-order logic — is a formal logical system used in mathematics, philosophy, linguistics, and computer science. It goes by many names, including: first order predicate calculus, the lower predicate calculus, quantification theory, and predicate logic (a less… …   Wikipedia

  • first order of business — UK US noun [C] (plural first orders of business) ► a situation or subject that must be dealt with before anything else: »When the financial situation gets difficult, the first order of business is to define your goals and your priorities …   Financial and business terms

  • first-order languages — first order language …   Philosophy dictionary

  • First-order hold — The first order hold (FOH) is a mathematical model of the practical reconstruction of sampled signals that could be done by a conventional digital to analog converter (DAC) and an analog circuit called an integrator. For the FOH, the signal is… …   Wikipedia

  • First-order control — In control theory, first order control is when a desired result is attempted by adjusting a scalar (first order) control. Such mechanisms, where first order change successfully produces desired results, are called first order mechanisms . First… …   Wikipedia

  • First-order reduction — A first order reduction is a very weak type of reduction between two computational problems in computational complexity theory. A first order reduction is a reduction where each component is restricted to be in the class FO of problems calculable …   Wikipedia

  • First order partial differential equation — In mathematics, a first order partial differential equation is a partial differential equation that involves only first derivatives of the unknown function of n variables. The equation takes the form: F(x 1,ldots,x n,u,u {x 1},ldots u {x n}) =0 …   Wikipedia


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