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Schwinger's variational principle
(redirected from Schwinger variational principle)

   Also found in: Wikipedia 0.01 sec.
Schwinger's variational principle [′shviŋ·ərz ‚ver·ē′ā·shən·əl ‚prin·sə·pəl]
(physics)
A method used in electromagnetic theory, or similar disciplines, to calculate an approximate value or a linear of quadratic functional, such as a scattering amplitude or reflection coefficient, when the function for which the functional is evaluated is the solution of an integral equation.


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