Recovery of Dirac system from the rectangular Weyl matrix function
arXiv:1106.1263 · doi:10.1088/0266-5611/28/1/015010
Abstract
Weyl theory for Dirac systems with rectangular matrix potentials is non-classical. The corresponding Weyl functions are rectangular matrix functions. Furthermore, they are non-expansive in the upper semi-plane. Inverse problems are treated for such Weyl functions, and some results are new even for the square Weyl functions. High energy asymptotics of Weyl functions and Borg-Marchenko type uniqueness results are derived too.