@Article{Ismailov2010,
author = "Ismailov, Zameddin I. and Unluyol, Erdal",
title = "Hyponormal differential operators with discrete spectrum",
journal = "Opuscula Math.",
year = "2010",
volume = "30",
number = "1",
pages = "79--94",
doi = "http://dx.doi.org/10.7494/OpMath.2010.30.1.79",
url = "http://dx.doi.org/10.7494/OpMath.2010.30.1.79",
abstract = "In this work, we first describe all the maximal hyponormal extensions of a minimal operator generated by a linear differential-operator expression of the first-order in the Hilbert space of vector-functions in a finite interval. Next, we investigate the discreteness of the spectrum and the asymptotical behavior of the modules of the eigenvalues for these maximal hyponormal extensions.",
keywords = "hyponormal operators, differential operators, minimal and maximal operators, extension of operators, compact operators, eigenvalues, asymptotes of eigenvalues",
issn = "1232-9274"
}