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arXiv math-ph/0701009math-phmath.MPmath.SP
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度量图的热核与一个迹公式

Heat kernels on metric graphs and a trace formula

Vadim Kostrykin, Jurgen Potthoff, Robert Schrader

摘要:

我们研究了度量图上由自伴Laplace算子生成的热半群,其特征在于度量图的每个顶点的局部散射矩阵与谱参数无关.对于这样的运营商,我们证明了一个表示的热核作为一个总和在所有的行走给定的初始和终端边缘。利用这个表示证明了热半群的一个迹公式。本文还讨论了迹公式在反谱和散射问题中的应用。

英文摘要:

We study heat semigroups generated by self-adjoint Laplace operators on metric graphs characterized by the property that the local scattering matrices associated with each vertex of the graph are independent from the spectral parameter. For such operators we prove a representation for the heat kernel as a sum over all walks with given initial and terminal edges. Using this representation a trace formula for heat semigroups is proven. Applications of the trace formula to inverse spectral and scattering problems are also discussed.

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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