BOUNDEDLY SOLVABLE NEUTRAL TYPE DELAY DIFFERENTIAL OPERATORS OF THE FIRST ORDER


Ismailov Z. I. , Al Ipek P.

EURASIAN MATHEMATICAL JOURNAL, cilt.10, ss.20-27, 2019 (ESCI İndekslerine Giren Dergi) identifier identifier

Özet

In this work, by using methods of operator theory, all boundedly solvable extensions of the minimal operator generated by a linear neutral type delay differential-operator expression of the first order in a Hilbert space of vector-functions on a finite interval are described. Furthermore, the geometry of spectrum sets of these operators is studied.