The c‐Entropy optimality of Donoghue classes

S. Belyi, K. A. Makarov and E. Tsekanovskii

Mathematische Nachrichten, 2026, vol. 299, issue 2, 433-455

Abstract: In this paper, we evaluate c‐Entropy of perturbed L‐systems introduced in Belyi and Tsekanovskii [Complex Anal. Oper. Theory 13 (2019), no. 3, 1227–1311]. Explicit formulas relating the c‐Entropy of the L‐systems and the perturbation parameter are established. We also show that c‐Entropy attains its maximum value (finite or infinite) whenever the perturbation parameter vanishes so that the impedance function of such a L‐system belongs to one of the generalized (or regular) Donoghue classes.

Date: 2026
References: Add references at CitEc
Citations:

Downloads: (external link)
https://doi.org/10.1002/mana.70096

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:bla:mathna:v:299:y:2026:i:2:p:433-455

Ordering information: This journal article can be ordered from
http://www.blackwell ... bs.asp?ref=0025-584X

Access Statistics for this article

Mathematische Nachrichten is currently edited by Robert Denk

More articles in Mathematische Nachrichten from Wiley Blackwell
Bibliographic data for series maintained by Wiley Content Delivery ().