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On the Nodal set of a second Dirichlet eigenfunction in a doubly connected domain
Annales de la Faculté des sciences de Toulouse : Mathématiques, Série 6, Tome 27 (2018) no. 4, pp. 863-873.

Ce papier étudie la géométrie de l’ensemble nodal de la seconde fonction propre du laplacien avec conditions de Dirichlet dans un domaine doublement connexe de forme Ω=DB ¯. Les résultats obtenus sont utilisés dans un problème d’optimisation de la seconde valeur propre.

We investigate the geometry of the nodal set of a second eigenfunction of the Dirichlet Laplacian in a doubly connected Euclidean plane domain of the form Ω=DB ¯ and obtain results of Payne’s type. For instance, we prove that when D and B are symmetric and convex with respect to a line, then the nodal set cannot enclose B. Moreover, if Ω has a second axis of symmetry, then the nodal line intersects both B and D.

We also use these results in the optimization of the second eigenvalue for the problem of optimal placement of B within D.

Reçu le :
Accepté le :
Publié le :
DOI : 10.5802/afst.1585
Classification : 35P15, 49R50
Mots clés : Dirichlet Laplacian, Nodal set, second eigenfunction, extremal eigenvalue
Rola Kiwan 1

1 American University in Dubai, P.O.Box 28282, Dubai, United Arab Emirates
Licence : CC-BY 4.0
Droits d'auteur : Les auteurs conservent leurs droits
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     author = {Rola Kiwan},
     title = {On the {Nodal} set of a second {Dirichlet} eigenfunction in a doubly connected domain},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {863--873},
     publisher = {Universit\'e Paul Sabatier, Toulouse},
     volume = {Ser. 6, 27},
     number = {4},
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Rola Kiwan. On the Nodal set of a second Dirichlet eigenfunction in a doubly connected domain. Annales de la Faculté des sciences de Toulouse : Mathématiques, Série 6, Tome 27 (2018) no. 4, pp. 863-873. doi : 10.5802/afst.1585. https://afst.centre-mersenne.org/articles/10.5802/afst.1585/

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