3 papers
math.SP2020
Full indefinite Stieltjes moment problem and Padé approximants
V. Derkach, I. Kovalyov
Full indefinite Stieltjes moment problem is studied via the step-by-step Schur algorithm. Naturally associated with indefinite Stieltjes moment problem are generalized Stieltjes co…
math.CA2017
Uncertainty product for Vilenkin groups
Ivan Kovalyov, Elena Lebedeva
We study a localization of functions defined on Vilenkin groups. To measure the localization we introduce two uncertainty products and that are similar to the Heise…
math.CA2016
Schur algorithm for Stieltjes indefinite moment problem
Vladimir Derkach, Ivan Kovalyov
Nondegenerate truncated indefinite Stieltjes moment problem in the class of generalized Stieltjes functions is considered. To describe the set of solutions of th…