Uniqueness of the Kernel Determination Problem in a Integro-Differential Parabolic Equation with Variable Coefficients

IF 0.5 Q3 MATHEMATICS
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引用次数: 0

Abstract

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 in which 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, an equation is formed 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 \(k(x,t) = \sum\limits_{i = 0}^N {{a}_{i}}(x){{b}_{i}}(t)\) , then \({{k}_{1}}(x,t) \equiv {{k}_{2}}(x,t)\) . Thus, the theorem on the uniqueness of the solution of the problem is proved.

具有可变系数的积分微分抛物方程中内核确定问题的唯一性
摘要 我们研究了从\(n\) -dimensional热传导积分微分方程的已知 Cauchy 问题解中确定与时间和空间有关的积分项内核的逆问题。首先,原问题被等价问题所取代,在等价问题中,一个附加条件包含了无积分的未知核。我们研究了确定此核的唯一性问题。接下来,假定所述问题有两个解 \({{k}_{1}}(x,t)\) 和 \({{k}_{2}}(x,t)\) ,形成了这个解的差分方程。目前正在利用积分方程估计技术对问题解的差({{k}_{1}}(x,t) - {{k}_{2}}(x,t))进行进一步研究。结果表明,如果未知核 \(k(x,t)\)可以表示为 \(k(x,t) = \sum\limits_{i = 0}^N {{a}_{i}}(x){{b}_{i}}(t)\)则 \({{k}_{1}}(x,t) \equiv {{k}_{2}}(x,t)\) 。这样,问题解的唯一性定理就得到了证明。
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来源期刊
Russian Mathematics
Russian Mathematics MATHEMATICS-
CiteScore
0.90
自引率
25.00%
发文量
0
期刊介绍: Russian Mathematics  is a peer reviewed periodical that encompasses the most significant research in both pure and applied mathematics.
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