Geodesic
Boundedly solvable neutral type delay differential operators of the first order
Eurasian mathematical journal, Tome 10 (2019) no. 3, pp. 20-27

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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. 
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     author = {Z. I. Ismailov and P. Ipek Al},
     title = {Boundedly solvable neutral type delay differential operators of the first order},
     journal = {Eurasian mathematical journal},
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     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EMJ_2019_10_3_a1/}
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Z. I. Ismailov; P. Ipek Al. Boundedly solvable neutral type delay differential operators of the first order. Eurasian mathematical journal, Tome 10 (2019) no. 3, pp. 20-27. http://geodesic.mathdoc.fr/item/EMJ_2019_10_3_a1/