Uniqueness of the kernel determination problem in an integro-differential parabolic equation with variable coefficient

D. K. Durdiev ; J. Z. Nuriddinov

Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (2023), pp. 3-14

Résumé

We investigate the inverse problem of determining the time and space dependent kernel of the integral term in the $n$-dimensional integro-differential equation of heat conduction from the known solution of the Cauchy problem for this equation. First, the original problem is replaced by the equivalent problem where an additional condition contains the unknown kernel without integral. We study the question of the uniqueness of the determining of this kernel. Next, assuming that there are two solutions $k_1(x,t)$ and $k_2(x,t)$ of the stated problem, it is formed an equation for the difference of this solution. Further research is being conducted for the difference $k_1(x,t)-k_2(x,t)$ of solutions of the problem and using the techniques of integral equations estimates. It is shown that if the unknown kernel $k(x,t)$ can be represented as $k(x,t)=\displaystyle\sum\limits_{i=0}^Na_i(x)b_i(t)$, then $k_1(x,t)\equiv k_2(x,t)$. Thus, the theorem on the uniqueness of the solution of the problem is proved.

Détail

Keywords: inverse problem, Cauchy problem, integral equation, uniqueness.
Mots-clés : parabolic equation