Non - Perturbative
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Non - Perturbative

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High Quality Content by WIKIPEDIA articles! In mathematics and physics, a non-perturbative function or process is one that cannot be accurately described by perturbation theory. The Taylor series for this function is exactly zero to all orders in perturbation theory, but the function is non-zero if x 0. The implication of this for physics is that there are some phenomena which are impossible to understand by perturbation theory, however many orders of perturbation theory we use. Instantons are an example. Therefore, in theoretical physics, a non-perturbative solution or theory is one that does...