Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8896583 | Journal of Functional Analysis | 2018 | 44 Pages |
Abstract
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 aÎ, where Î is the Dirichlet-to-Neumann operator of the unit disk. Zeta-invariants are defined by Zm(a)=Tr[(aÎ)2mâ(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 Câ-topology. We also describe all real functions a satisfying Zm(a)=0.
Keywords
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
Authors
Alexandre Jollivet, Vladimir Sharafutdinov,