arXiv subjects

Aleksei P. Kiselev

Publications and source records attributed to Aleksei P. Kiselev.

2 recordsLinked to original sources

arXiv2025

Asymptotics of a finite-energy unidirectional solution of the wave equation with non-spherical-wave behavior at infinity

A detailed investigation is presented of a simple unidirectional finite-energy solution of the 3D wave equation. Its asymptotics as a spatial point runs to infinity with the wave propagations speed is a standard spherical wave as z < 0, where z is a Cartesian coordinate, and has an additional factor logarithmic with respect to the distance as z > 0. Asymptotics for a point running to infinity with an arbitrary constant speed is discussed

physics.optics↗

arXiv2022

The Malyuzhinets-Popov diffraction problem revisited

In this paper, the high-frequency diffraction of a plane wave incident along a planar boundary turning into a smooth convex contour, so that the curvature undergoes a jump, is asymptotically analysed. An approach modifying the Fock parabolic-equation method is developed. Asymptotic formulas for the wavefield in the illuminated area, shadow, and the penumbra are derived. The penumbral field is characterized by novel and previously unseen special functions that resemble Fock's integrals.

math-ph↗