On the inverse spectral problem for Euclidean triangles

On the inverse spectral problem for Euclidean triangles
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关于欧氏三角形的反谱问题

DOI:
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发表时间:
2011
期刊:
Proceedings of the Royal Society A
影响因子:
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通讯作者:
P. Freitas
P. Freitas
中科院分区:
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文献类型:
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作者:
Pedro R. S. Antunes;P. Freitas

文献摘要

被引文献

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本文考虑三角形Dirichlet边界条件下拉普拉斯算子的逆谱问题,给出了特征值三元组(λ1,λ2,λ3)足以唯一确定三角形的数值证据.另一方面,我们证明了其他组合,如(λ1,λ2,λ4)将是不够的,并且在这些三元组上至少存在两个具有相同值的三角形。
We consider the inverse spectral problem for the Laplace operator on triangles with Dirichlet boundary conditions, providing numerical evidence to the effect that the eigenvalue triplet (λ1,λ2,λ3) is sufficient to determine a triangle uniquely. On the other hand, we show that other combinations such as (λ1,λ2,λ4) will not be enough, and that there will exist at least two triangles with the same values on these triplets.