Abstract
We develop a scheme for constructing chains of equations for the irreducible Green's functions. The structure of the equations allows going beyond the usual perturbation theory in solving specific problems. We obtain general relations that allow any correlation function to be expressed through solutions of an infinite chain of equations for the irreducible functions.
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Translated from Teoreticheskaya i Matematischeskaya Fizika, Vol. 118, No. 1, pp. 105–125, January, 1999.
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Tserkovnikov, Y.A. Two-time temperature Green's functions in kinetic theory and molecular hydrodynamics: I. The chain of equations for the irreducible functions. Theor Math Phys 118, 85–100 (1999). https://doi.org/10.1007/BF02557198
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DOI: https://doi.org/10.1007/BF02557198