High Quality Content by WIKIPEDIA articles! In physics, especially quantum field theory, regularization is a method of dealing with infinite, divergent, and non-sensical expressions by introducing an auxiliary concept of a regulator (for example, the minimal distance ? in space which is useful if the divergences arise from short-distance physical effects). The correct physical result is obtained in the limit in which the regulator goes away (in our example, epsilonto 0), but the virtue of the regulator is that for its finite value, the result is finite.

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