perturbation theory

perturbation theory
noun
: any of various methods of calculating the approximate value of a complex function (as the energy of an electron in quantum mechanics) by first assuming that the dominant influence is the only factor and then making small corrections for additional factors

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perturbation theory noun (physics)
A mathematical method of determining the effect of small local changes on the behaviour of a system
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Main Entry:perturb

Useful english dictionary. 2012.

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