= Resummation
{wiki=Resummation}
Resummation is a mathematical technique used primarily in the field of theoretical physics, especially in quantum field theory and statistical mechanics, to handle divergent series or to improve the convergence properties of a series of terms. It can be applied to various types of problems, including perturbation expansions, series expansions, and other contexts where traditional summation methods may fail to yield meaningful results. The basic idea is to use a new summation method or transformation to obtain a finite result from an otherwise divergent series.
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