Results 121 to 129 of about 1,463 (129)

Controllability of second order discrete-time descriptor systems

E S A I M: Control, Optimisation and Calculus of Variations
This paper is mainly devoted to the controllability of second order discrete-time descriptor systems. Characterizations for different controllability concepts are derived and feedback designs are investigated by transforming the system into an ...
Ha Phi, Do Duc Thuan
semanticscholar   +1 more source

Non-Isolation of weighted composition operators on L^p(μ)(1 ≤ p ≤ ∞ ) spaces

Tuijin Jishu/Journal of Propulsion Technology
Assuming X is a compact Hausdorff space and (X) denotes the Banach algebra of continuous complex-valued functions on X with the supremum norm, comp (X) refers to the collection of all composition operators on (X).
Ashish Naudiyal
semanticscholar   +1 more source

Jost Solution of the Matrix Difference Equations

Sarajevo Journal of Mathematics
In this paper, we investigate the Jost solution and the analytical properties of the Jost solution of the non-selfadjoint matrix difference equation of second order.   2000 Mathematics Subject Classification.
Seyhmus Yardimci
semanticscholar   +1 more source

The Coupling Constant Threshold Effects for One-Particle Schrödinger-Type Operators in Lattice

Journal of Geometry and Symmetry in Physics
We investigate the threshold effects self-adjoint bounded discrete Schrödinger-type operators in the Hilbert space of square-summable complex-valued functions defined on the d -dimensional lattice and establish the existence of eigenvalues and their ...
Firdavs Almuratov, Xurshid Sharipov, Salokhiddin Alimov   +2 more
semanticscholar   +1 more source

Mini-Workshop: Boundary Value Problems and Spectral Geometry

, 2012
Boundary value problems and spectral geometry is an attractive and rapidly developing area in modern mathematical analysis. The interaction of PDE methods with concepts from operator theory and differential geometry is particularly challenging and leads ...
J. Behrndt, Konstantin Pankrashkin, Olaf Post   +2 more
semanticscholar   +1 more source

Some properties of the essential numerical range on Banach spaces

, 2017
We study the properties of the essential algebraic numerical range as well as the essential spatial numerical range for Banach space operators.
L. Muhati, J. Bonyo, J. O. Agure
semanticscholar   +1 more source

How and Why to Solve the Operator Equation AX−XB = Y

, 1997
R. Bhatia, P. Rosenthal
semanticscholar   +1 more source

Non‐Self‐Adjoint Differential Operators

, 2002
E. Davies
semanticscholar   +1 more source

Integral representations of resolvents and semigroups

, 1994
W. Arendt, A. Bukhvalov
semanticscholar   +1 more source