The article is devoted to the existence of solutions of a system of integro-differential equations involving the drift terms in the case of the normal diffusion and the influx/efflux terms proportional to the Dirac delta function. The proof of the existence of solutions is based on a fixed point technique. We use the solvability conditions for the non- Fredholm elliptic operators in unbounded domains. We emphasize that the study of the systems is more difficult than of the scalar case and requires to overcome more cumbersome technicalities.
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Schlagwörter35j05 ; 35p30 ; 47f05 ; Dirac Delta Function ; Integro-differential Systems ; Non-fredholm Operators ; Sobolev Spaces; Nonlinear Schrodinger-equation; Properness Properties; Elliptic-operators; Fredholm; Dirichlet; Existence