- Turkish Journal of Mathematics
- Vol: 42 Issue: 4
- First order self-adjoint multipoint quasi-differential operators
First order self-adjoint multipoint quasi-differential operators
Authors : Rukiye Öztürk Mert, Bülent Yilmaz, Zameddin Ismailov
Pages : 2071-2079
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Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :In this paper, using the Calkin-Gorbachuk method, the general form of all self-adjoint operators generated by first order linear singular multipoint quasi-differential expressions in the direct sum of weighted Hilbert spaces of vector functions has been found. Later on, the geometry of the spectrum set of these type extensions was researched.Keywords : Selfadjoint operators, multipoint quasi-differential expression, deficiency indices, spectrum