Asymptotic behavior of Carleman weight functions (2412.19892v1)

Abstract: This work aims to establish the asymptotic behavior of Carleman weight functions when discrete difference and average operators are applied. We provide a characterization of the error term in arbitrary order and dimension, extending previously known results. This generalization is of independent interest due to its applications in deriving discrete deterministic and stochastic Carleman estimates where the asymptotic behavior of the Carleman weight functions is crucial. The aforementioned asymptotic behavior holds for Carleman weight functions used for parabolic, hyperbolic, and elliptic operators, which are applied to obtain control and inverse problems results for those operators.