From KAM Tori to Isospectral Invariants and Spectral Rigidity of Billiard Tables
From KAM Tori to Isospectral Invariants and Spectral Rigidity of Billiard Tables
This article is a part of a project investigating the relationship between the dynamics of completely integrable or to completely integrable billiard tables, the integral geometry on them, and the spectrum of the corresponding Laplace-Beltrami operators. It is concerned with new isospectral invariants and with the spectral rigidity problem for …