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Steklov zeta-invariants and a compactness theorem for isospectral families of planar domains. / Jollivet, Alexandre; Sharafutdinov, Vladimir.
в: Journal of Functional Analysis, Том 275, № 7, 01.10.2018, стр. 1712-1755.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Steklov zeta-invariants and a compactness theorem for isospectral families of planar domains
AU - Jollivet, Alexandre
AU - Sharafutdinov, Vladimir
N1 - Publisher Copyright: © 2018 Elsevier Inc.
PY - 2018/10/1
Y1 - 2018/10/1
N2 - The inverse problem of recovering a smooth simply connected multisheet planar domain from its Steklov spectrum is equivalent to the problem of determination, up to a gauge transform, of a smooth positive function a on the unit circle from the spectrum of the operator aΛ, where Λ is the Dirichlet-to-Neumann operator of the unit disk. Zeta-invariants are defined by Zm(a)=Tr[(aΛ)2m−(aD)2m] for every smooth function a. In the case of a positive a, zeta-invariants are determined by the Steklov spectrum. We obtain some estimate from below for Zm(a) in the case of a real function a. On using the estimate, we prove the compactness of a Steklov isospectral family of planar domains in the C∞-topology. We also describe all real functions a satisfying Zm(a)=0.
AB - The inverse problem of recovering a smooth simply connected multisheet planar domain from its Steklov spectrum is equivalent to the problem of determination, up to a gauge transform, of a smooth positive function a on the unit circle from the spectrum of the operator aΛ, where Λ is the Dirichlet-to-Neumann operator of the unit disk. Zeta-invariants are defined by Zm(a)=Tr[(aΛ)2m−(aD)2m] for every smooth function a. In the case of a positive a, zeta-invariants are determined by the Steklov spectrum. We obtain some estimate from below for Zm(a) in the case of a real function a. On using the estimate, we prove the compactness of a Steklov isospectral family of planar domains in the C∞-topology. We also describe all real functions a satisfying Zm(a)=0.
KW - Dirichlet-to-Neumann operator
KW - Inverse spectral problem
KW - Steklov spectrum
KW - Zeta function
KW - SETS
KW - NEUMANN OPERATOR
UR - http://www.scopus.com/inward/record.url?scp=85049753622&partnerID=8YFLogxK
U2 - 10.1016/j.jfa.2018.06.019
DO - 10.1016/j.jfa.2018.06.019
M3 - Article
AN - SCOPUS:85049753622
VL - 275
SP - 1712
EP - 1755
JO - Journal of Functional Analysis
JF - Journal of Functional Analysis
SN - 0022-1236
IS - 7
ER -
ID: 14481889