The papers comprising this collection are directly or indirectly related to an important branch of mathematical physics - the mathematical theory of wave propagation and diffraction. The paper by V. M. Babich is concerned with the application of the parabolic-equation method (of Academician V. A. Fok and M. A, Leontovich) to the problem of the asymptotic behavior of eigenfunc- tions concentrated in a neighborhood of a closed geodesie in a Riemannian space. The techniques used in this paper have been found useful in solving certain problems in the theory of open resonators. The topic of G. P....
The papers comprising this collection are directly or indirectly related to an important branch of mathematical physics - the mathematical theory of w...