Ismailov, ZameddinIpek, Pembe2023-05-302023-05-302016-01-12Ismailov, Z., & Ipek, P. (2016). Selfadjoint singular differential operators of first order and their spectrum. <i>Electronic Journal of Differential Equations, 2016</i>(21), pp. 1-9.1072-6691https://hdl.handle.net/10877/16893Based on Calkin-Gorbachuk method, we describe all selfadjoint extensions of the minimal operator generated by linear multipoint singular symmetric differential-operator, as a direct sum of weighted Hilbert space of vector-functions. Another approach to the investigation of this problem has been done by Everitt, Zettl and Markus. Also we study the structure of spectrum of these extensions.Text9 pages1 file (.pdf)enAttribution 4.0 InternationalSingular Selfadjoint differential operatorSpectrumArticle