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Abschätzung der Greenschen Funktion der Helmholtzschen Gleichung in der Schattenzone im dreidimensionalen Fall. (Russian) Zbl 0329.35017
MSC:
35J05 Laplace operator, Helmholtz equation (reduced wave equation), Poisson equation
35B05 Oscillation, zeros of solutions, mean value theorems, etc. in context of PDEs
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