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arXiv 2304.05487math.SP
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具有常时滞和非零初始函数的逆Sturm-Liouville型问题

An inverse Sturm--Liouville-type problem with constant delay and non-zero initial function

Sergey Buterin, Sergey Vasilev

AI总结:

本文研究具有常时滞和非零连续匹配初始函数的Sturm-Liouville型算子逆谱问题,在部分谱已知情形下给出势唯一确定的充分必要条件及构造性求解方法,并刻画了零初始函数与Neumann共同边界条件下的谱特征。

摘要:

我们对具有常时滞的Sturm-Liouville型算子提出了一种新的逆谱问题表述。该逆问题在于从两个具有一个共同边界条件的边值问题的谱中恢复相应方程中时滞项的系数(通常称为势)。然而,该方向的所有研究都集中在零初始函数的情形,即它们利用了势在相应子区间上为零的假设。在本文中,我们放弃该假设,转而采用连续匹配的初始函数,这导致方程中出现一个带有冻结变量的附加项。对于由此产生的新逆问题,我们特别关注其中一个谱仅部分给定的情形。我们得到了相应子谱唯一确定势的充分条件和必要条件,并给出了求解该逆问题的构造性方法。同时,我们得到了零初始函数和Neumann共同边界条件下谱的刻画,发现与Dirichlet共同条件的情形相比,该刻画包含一个额外的限制。

英文摘要:

We suggest a new statement of the inverse spectral problem for Sturm--Liouville-type operators with constant delay. This inverse problem consists in recovering the coefficient (often referred to as potential) of the delayed term in the corresponding equation from the spectra of two boundary value problems with one common boundary condition. However, all studies in this direction focus on the case of the zero initial function, i.e. they exploit the assumption that the potential vanishes on the corresponding subinterval. In the present paper, we waive that assumption in favor of a continuously matching initial function, which leads to appearing an additional term with frozen argument in the equation. For the resulting new inverse problem, we pay a special attention to the situation when one of the spectra is given only partially. Sufficient conditions and necessary conditions on the corresponding subspectrum for the unique determination of the potential are obtained, and a constructive procedure for solving the inverse problem is given. In parallel, we obtain the characterization of the spectra for the zero initial function and the Neumann common boundary condition, which is found to include an additional restriction as compared with the case of the Dirichlet common condition.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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