Contributions to Books:
R. Pruckner, H. Woracek:
"Estimates for order of Nevanlinna matrices and a Berezanskii-type theorem";
in: "ASC Report 21/2016",
issued by: Institute for Analysis and Scientific Computing;
Vienna University of Technology,
We give an upper estimate for the order of the entire functions in the Nevanlinna parameterisation of the solutions of an indeterminate Hamburger moment problem. Under a regularity condition this estimate becomes explicit and takes the form of a convergence exponent. Proofs are based on transformations of canonical systems and I.S.Kac´ formula for the spectral asymptotics of a string. Combining with a lower estimate from previous work, we obtain a class of moment problems for which order can be computed. This generalises a theorem of Yu.M.Berezanskii about spectral asymptotics of a Jacobi matrix (in the case that order is ≤ 1/2).
indeterminate moment problem, order of entire function, Berezanskii´s theorem, canonical system
Electronic version of the publication:
Created from the Publication Database of the Vienna University of Technology.