Boundary Value Problems Analysis and Pseudo-Differential Operators in Acoustics
It is well known that partial differential problems can be solved by using integrals (more or less singular). Moreover, since some years, such problems are tried to be solved by integral problems defined on the boundary of the concerned domain (P.J.T. Filippi1). Furthermore differential problems are not sufficient to account for many physical problems. In particular boundary conditions can often be integral.
KeywordsDifferential Operator Phase Function Elliptic Problem Singular Integral Equation Helmholtz Equation
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