Factorization of the Green's function of high-frequency acoustic half-space impedance problems.

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Title: Factorization of the Green's function of high-frequency acoustic half-space impedance problems.
Authors: Lin, C.1 (AUTHOR) chuhe.lin@math.uzh.ch, Melenk, J. M.2 (AUTHOR) melenk@tuwien.ac.at, Sauter, S.1 (AUTHOR) stas@math.uzh.ch
Source: Zeitschrift für Angewandte Mathematik und Physik (ZAMP). May2026, Vol. 77 Issue 5, p1-27. 27p.
Subjects: Green's functions, Acoustic impedance, Mathematical functions, Eikonal equation, Factorization, Ultrasonic waves, Boundary value problems
Abstract: We show that the acoustic Green's function for a half-space impedance problem in arbitrary spatial dimension d can be written as a sum of three terms, each of which is the product of an exponential function with the eikonal in the argument and a slowly varying function. We introduce the notion of families of slowly varying functions to formulate this statement as a theorem and present its proof. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:We show that the acoustic Green's function for a half-space impedance problem in arbitrary spatial dimension d can be written as a sum of three terms, each of which is the product of an exponential function with the eikonal in the argument and a slowly varying function. We introduce the notion of families of slowly varying functions to formulate this statement as a theorem and present its proof. [ABSTRACT FROM AUTHOR]
ISSN:00442275
DOI:10.1007/s00033-026-02782-0