Asymptotic solution of the Cauchy problem for the singularly perturbed partial integro-differential equation with rapidly oscillating coefficients and with rapidly oscillating heterogeneity

• Main Authors: Kalimbetov Burkhan T., Tuychiev Olim D.
• Format: Article
• Language: English
• Published: De Gruyter 2021-05-01
• Series: Open Mathematics
• Subjects: singularly perturbed; integro-partial differential equation; regularization of an integral; space of non-resonant solutions; iterative problems; solvability of iterative problems; 35f10; 35r09
• Online Access: https://doi.org/10.1515/math-2021-0021

In this paper, the regularization method of S. A. Lomov is generalized to integro-differential equations with rapidly oscillating coefficients and with a rapidly oscillating right-hand side. The main goal of the work is to reveal the influence of the oscillating components on the structure of the asymptotics of the solution of this problem. The case of coincidence of the frequencies of a rapidly oscillating coefficient and a rapidly oscillating inhomogeneity is considered. In this case, only the identical resonance is observed in the problem. Other cases of the relationship between frequencies can lead to so-called non-identical resonances, the study of which is nontrivial and requires the development of a new approach. It is supposed to study these cases in our further work.