Nodal length of Steklov eigenfunctions on real-analytic Riemannian surfaces

Iosif Polterovich, David A. Sher, John A. Toth
2017 Journal für die Reine und Angewandte Mathematik  
AbstractWe prove sharp upper and lower bounds for the nodal length of Steklov eigenfunctions on real-analytic Riemannian surfaces with boundary. The argument involves frequency function methods for harmonic functions in the interior of the surface as well as the construction of exponentially accurate approximations for the Steklov eigenfunctions near the boundary.
doi:10.1515/crelle-2017-0018 fatcat:jdtkzahkwjfclg6jmzje36lmhy