High-energy asymptotics of Titchmarsh-Weyl functions are obtained for generalised canonical systems, generalizing a Gesztesy-Simon result, along with a new identity for the matrix amplitude function.
Sakhnovich, On the solution of the inverse problem for a class of canonical systems corresponding to matrix string equatio ns
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Generalised canonical systems related to matrix string equations: corresponding structured operators and high-energy asymptotics of the Weyl functions
High-energy asymptotics of Titchmarsh-Weyl functions are obtained for generalised canonical systems, generalizing a Gesztesy-Simon result, along with a new identity for the matrix amplitude function.