SELFADJOINT EXTENSIONS OF MULTIPOINT SINGULAR DIFFERENTIAL OPERATORS


Ismailov Z.

ELECTRONIC JOURNAL OF DIFFERENTIAL EQUATIONS, 2013 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası:
  • Basım Tarihi: 2013
  • Dergi Adı: ELECTRONIC JOURNAL OF DIFFERENTIAL EQUATIONS

Özet

This article describes all selfadjoint extensions of the minimal operator generated by a linear singular multipoint symmetric differential-operator expression for first order in the direct sum of Hilbert spaces of vector-functions. This description is done in terms of the boundary values, and it uses the Everitt-Zettl and the Calkin-Gorbachuk methods. Also the structure of the spectrum of these extensions is studied.