On the spectrum of the double-layer operator on locally-dilation-invariant Lipschitz domains
On the spectrum of the double-layer operator on locally-dilation-invariant Lipschitz domains
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局部膨胀不变Lipschitz域上双层算子的谱
DOI:
10.1007/s00211-023-01353-z
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发表时间:
2023
影响因子:
2.1
通讯作者:
Chandler-Wilde S
中科院分区:
文献类型:
--
作者:
Chandler-Wilde S
We say that, the boundary of a bounded Lipschitz domain, is locally dilation invariant if, at each,is either locallyor locally coincides (in some coordinate system centred atx) with a Lipschitz graphsuch that, for some. In this paper we study, for such, the essential spectrum of, the double-layer (or Neumann–Poincaré) operator of potential theory, on. We show, via localisation and Floquet–Bloch-type arguments, that this essential spectrum is the union of the spectra of related continuous families of operators, for; moreover, eachis compact ifisexcept at finitely many points. For the 2D case where, additionally,is piecewise analytic, we construct convergent sequences of approximations to the essential spectrum of; each approximation is the union of the eigenvalues of finitely many finite matrices arising from Nyström-method approximations to the operators. Through error estimates with explicit constants, we also construct functionals that determine whether any particular locally-dilation-invariant piecewise-analyticsatisfies the well-known spectral radius conjecture, that the essential spectral radius ofonisfor all Lipschitz. We illustrate this theory with examples; for each we show that the essential spectral radiusis, providing additional support for the conjecture. We also, via new results on the invariance of the essential spectral radius under locally-conformaldiffeomorphisms, show that the spectral radius conjecture holds for all Lipschitz curvilinear polyhedra.
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DOI:
--
发表时间:
2012
期刊:
影响因子:
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作者:
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通讯作者:
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影响因子:
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作者:
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DOI:
10.1007/bf01696804
发表时间:
1930
期刊:
Monatshefte für Mathematik und Physik
影响因子:
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作者:
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0.8
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DOI:
10.1016/j.matpur.2017.10.012
发表时间:
2017
期刊:
Journal de Mathématiques Pures et Appliquées
影响因子:
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作者:
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通讯作者:
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