56 citations · 549 across the 34 of their papers we have counts for
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math.CA2017★ 18 cited
The Classical Moment Problem and Generalized Indefinite Strings
Jonathan Eckhardt, Aleksey Kostenko
We show that the classical Hamburger moment problem can be included in the spectral theory of generalized indefinite strings. Namely, we introduce the class of Krein-Langer strings…
math.CA2016★ 6 cited
Unique solvability of a coupling problem for entire functions
Jonathan Eckhardt
We establish the unique solvability of a coupling problem for entire functions which arises in inverse spectral theory for singular second order ordinary differential equations/two…