Search

Your search keyword '"Normal operator"' showing total 4 results
Start Over Descriptor "Normal operator" Publisher texas state university
4 results on '"Normal operator"'

1. Compact inverses of multipoint normal differential operators for first order

Author

Zameddin I. Ismailov, Elif Otkun Cevik, and Erdal Unluyol

Subjects
Direct sum of Hilbert spaces and operators, extension, multipoint selfadjoint operator, formally normal operator, normal operator, Mathematics, QA1-939
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.

Published
2011

2. On the solvability of a fourth order operator differential equations

Author

Ahmed Nouar

Subjects
Operator Pencil, operator differential equation, normal operator, Mathematics, QA1-939
Abstract

We establish sufficient conditions for the solvability of a fourth order operator differential equation. These conditions are expressed in terms of operator coefficients.

Published
2007

3. COMPACT INVERSES OF MULTIPOINT NORMAL DIFFERENTIAL OPERATORS FOR FIRST ORDER.

Author

ISMAILOV, ZAMEDDIN I., ÇEVIK, ELIF OTKUN, and UNLUYOL, ERDAL

Subjects
*OPERATOR theory, *DIFFERENTIAL equations, *HILBERT space, *BOUNDARY value problems, *INTERVAL analysis
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. [ABSTRACT FROM AUTHOR]

Published
2011

4. ON THE SOLVABILITY OF A FOURTH ORDER OPERATOR DIFFERENTIAL EQUATIONS.

Author

Nouar, Ahmed

Subjects
*DIFFERENTIAL equations, *NORMAL operators, *LINEAR operators, *OPERATOR theory, *MATHEMATICS
Abstract

We establish sufficient conditions for the solvability of a fourth order operator differential equation. These conditions are expressed in terms of operator coefficients. [ABSTRACT FROM AUTHOR]

Published
2007

Catalog

Books, media, physical & digital resources
See catalog results