Nonperturbative approach to(Wiener) functional integral with φ4 interaction
Abstract
We propose the another, in principe nonperturbative, method of the evaluation of the Wiener functional integral for φ4 term in the action. All infinite summations in the results are proven to be convergent. We finf the "generalized" Gelfand -- Yaglom differential equation implying the functional integral in the continuum limit.
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