Accession Number : AD0615140
Title : THE SCHWINGER VARIATION METHOD.
Descriptive Note : Revised ed.,
Corporate Author : CALIFORNIA UNIV BERKELEY
Personal Author(s) : Pinney,Edmund
Report Date : 08 JUL 1964
Pagination or Media Count : 13
Abstract : The Schwinger variation method is removed from its customary setting in Green's function theory, and is approached from the integral equations viewpoint. The traditional Schwinger theory is improved upon in two respects. Error bounds are provided for the approximations to A(f), a function determining waveguide transmission and reflection coefficients due to diaphragms containing windows. A method, involving quadratures only, is provided and will improve the accuracy of this approximation as much as desired.
Descriptors : (*INTEGRAL EQUATIONS, CALCULUS OF VARIATIONS), (*BOUNDARY VALUE PROBLEMS, INTEGRAL EQUATIONS), ELECTROMAGNETISM, ACOUSTICS, ELASTIC PROPERTIES, DIFFERENTIAL EQUATIONS, WAVEGUIDE WINDOWS, NUMERICAL METHODS AND PROCEDURES
Distribution Statement : APPROVED FOR PUBLIC RELEASE