On the Nodal Line Conjecture


We consider Dirichlet eigenfunctions of membrane problems. A counterexample to Payne’s nodal line conjecture is given, i.e. a domain in R2 (not simply connected) whose second eigenfunction has a nodal set disjoint from the boundary. Also a domain in R2 is given whose second eigenvalue has multiplicity three. Furthermore, some sufficient conditions are given which imply that an eigenfunction of a Dirichlet membrane problem in Rn has a zero set which hits the boundary.

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@inproceedings{HoffmannOstenhof1997OnTN, title={On the Nodal Line Conjecture}, author={M. Hoffmann-Ostenhof and T. Hoffmann-Ostenhof and Nikolai S. Nadirashvili}, year={1997} }