COMPACT INVERSES OF MULTIPOINT NORMAL DIFFERENTIAL OPERATORS FOR FIRST ORDER


İSMAİLOV Z. , Cevik E. O. , Unluyol E.

ELECTRONIC JOURNAL OF DIFFERENTIAL EQUATIONS, 2011 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume:
  • Publication Date: 2011
  • Title of Journal : ELECTRONIC JOURNAL OF DIFFERENTIAL EQUATIONS

Abstract

In this work, we describe all normal extensions of a multipoint minimal operators generated by linear multipoint differential-operator expressions for first order in the Hilbert space of vector functions, in terms of boundary values at the endpoints of infinitely many separated subintervals. Also we investigate compactness properties of the inverses of such extensions.