We address the question whether there is a three-dimensional bounded domain such that the Neumann–Poincaré operator defined on its boundary has infinitely many negative eigenvalues. It is proved in this paper that tori have such a property. It is done by decomposing the Neumann–Poincaré operator on tori into infinitely many self-adjoint compact operators on a Hilbert space defined on the circle using the toroidal coordinate system and the Fourier basis, and then by proving that the numerical range of infinitely many operators in the decomposition has both positive and negative values.
Mots-clés : Neumann-Poincaré operator, Negative eigenvalues, Tori, Stationary phase method
@article{AIHPC_2019__36_7_1817_0, author = {Ando, Kazunori and Ji, Yong-Gwan and Kang, Hyeonbae and Kawagoe, Daisuke and Miyanishi, Yoshihisa}, title = {Spectral structure of the {Neumann{\textendash}Poincar\'e} operator on tori}, journal = {Annales de l'I.H.P. Analyse non lin\'eaire}, pages = {1817--1828}, publisher = {Elsevier}, volume = {36}, number = {7}, year = {2019}, doi = {10.1016/j.anihpc.2019.05.002}, mrnumber = {4020525}, language = {en}, url = {http://www.numdam.org/articles/10.1016/j.anihpc.2019.05.002/} }
TY - JOUR AU - Ando, Kazunori AU - Ji, Yong-Gwan AU - Kang, Hyeonbae AU - Kawagoe, Daisuke AU - Miyanishi, Yoshihisa TI - Spectral structure of the Neumann–Poincaré operator on tori JO - Annales de l'I.H.P. Analyse non linéaire PY - 2019 SP - 1817 EP - 1828 VL - 36 IS - 7 PB - Elsevier UR - http://www.numdam.org/articles/10.1016/j.anihpc.2019.05.002/ DO - 10.1016/j.anihpc.2019.05.002 LA - en ID - AIHPC_2019__36_7_1817_0 ER -
%0 Journal Article %A Ando, Kazunori %A Ji, Yong-Gwan %A Kang, Hyeonbae %A Kawagoe, Daisuke %A Miyanishi, Yoshihisa %T Spectral structure of the Neumann–Poincaré operator on tori %J Annales de l'I.H.P. Analyse non linéaire %D 2019 %P 1817-1828 %V 36 %N 7 %I Elsevier %U http://www.numdam.org/articles/10.1016/j.anihpc.2019.05.002/ %R 10.1016/j.anihpc.2019.05.002 %G en %F AIHPC_2019__36_7_1817_0
Ando, Kazunori; Ji, Yong-Gwan; Kang, Hyeonbae; Kawagoe, Daisuke; Miyanishi, Yoshihisa. Spectral structure of the Neumann–Poincaré operator on tori. Annales de l'I.H.P. Analyse non linéaire, Tome 36 (2019) no. 7, pp. 1817-1828. doi : 10.1016/j.anihpc.2019.05.002. http://www.numdam.org/articles/10.1016/j.anihpc.2019.05.002/
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