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Seto, Michio
2024.
A Fock space approach to the theory of kernel functions.
Positivity,
Vol. 28,
Issue. 1,
Published online by Cambridge University Press: 03 June 2021
In this note, we give a new property of de Branges–Rovnyak kernels. As the main theorem, it is shown that the exponential of de Branges–Rovnyak kernel is strictly positive definite if the corresponding Schur class function is nontrivial.