摘要: The time-ordered many-time Green functions are studied for a general lattice Hamiltonian which includes effects of static electric field and homogeneous deformations. structure the self-energy part is investigated, integral equations derived cubic quartic vertex part. Die zeitgeordneten mehrzeitigen Greenschen Funktionen werden fur einen allgemeinen Gitterhamiltonoperator, der ein statisches elektrisches Feld und homogene Deformationen einschliest, betrachtet. Die Struktur des Selbstenergieoperators wird untersucht, kubischen biquadratischen Vertexanteil Integralgleichungen angegeben.
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