Geodesic
Normal extensions of a singular multipoint differential operator of first order
Electronic journal of differential equations, Tome 2012 (2012)
In this work, we describe all normal extensions of the minimal operator generated by linear singular multipoint formally normal differential expression

$ L_2(H,(-\infty ,a_1))\oplus L_2(H,(a_2,b_2)) \oplus L_2(H,(a_3,+\infty)) $

where $-\infty $. Also, we study the structure of the spectrum of these extensions.
Classification : 47A10, 47A20
Keywords: multipoint differential operators, selfadjoint and normal extension, spectrum 
@article{EJDE_2012__2012__a84,
     author = {Ismailov,  Zameddin I. and Mert,  Rukiye Ozturk},
     title = {Normal extensions of a singular multipoint differential operator of first order},
     journal = {Electronic journal of differential equations},
     year = {2012},
     volume = {2012},
     zbl = {1238.47027},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2012__2012__a84/}
}
TY  - JOUR
AU  - Ismailov,  Zameddin I.
AU  - Mert,  Rukiye Ozturk
TI  - Normal extensions of a singular multipoint differential operator of first order
JO  - Electronic journal of differential equations
PY  - 2012
VL  - 2012
UR  - http://geodesic.mathdoc.fr/item/EJDE_2012__2012__a84/
LA  - en
ID  - EJDE_2012__2012__a84
ER  - 
%0 Journal Article
%A Ismailov,  Zameddin I.
%A Mert,  Rukiye Ozturk
%T Normal extensions of a singular multipoint differential operator of first order
%J Electronic journal of differential equations
%D 2012
%V 2012
%U http://geodesic.mathdoc.fr/item/EJDE_2012__2012__a84/
%G en
%F EJDE_2012__2012__a84
Ismailov,  Zameddin I.; Mert,  Rukiye Ozturk. Normal extensions of a singular multipoint differential operator of first order. Electronic journal of differential equations, Tome 2012 (2012). http://geodesic.mathdoc.fr/item/EJDE_2012__2012__a84/