Results 31 to 40 of about 799,624 (312)
, 2020 In this contribution we consider sequences of monic polynomials orthogonal with respect to Sobolev-type inner product \[ \left\langle f,g\right\rangle= \langle {\bf u}^{\tt M},fg\rangle+\lambda \mathscr T^j f (\alpha)\mathscr T^{j}g(\alpha), \] where ...
Costas-Santos, R. S. +2 more
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Reverse Inequalities for the Numerical Radius of Linear Operators in Hilbert Spaces [PDF]
, 2005 Some elementary inequalities providing upper bounds for the difference of the norm and the numerical radius of a bounded linear operator on Hilbert spaces under appropriate conditions are ...
Dragomir, Sever Silvestru
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A Note on Stability of an Operator Linear Equation of the Second Order
Abstract and Applied Analysis, 2011 We prove some Hyers-Ulam stability results for an operator linear equation of the second order that is patterned on the difference equation, which defines the Lucas sequences (and in particular the Fibonacci numbers).
Janusz Brzdȩk, Soon-Mo Jung
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Periodic Problems of Difference Equations and Ergodic Theory
Abstract and Applied Analysis, 2011 The necessary and sufficient conditions for solvability of the family of difference equations with periodic boundary condition were obtained using the notion of relative spectrum of linear bounded operator in the Banach space and the ergodic theorem.
B. A. Biletskyi +2 more
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Boundary value problems for systems of non-degenerate difference-algebraic equations
Visnik Harkivsʹkogo Nacionalʹnogo Universitetu im. V.N. Karazina. Cepiâ Matematika, Prikladna Matematika i Mehanika, 2019 The study of differential-algebraic boundary value problems was initiated in the works of K. Weierstrass, N.N. Luzin and F.R. Gantmacher. Systematic study of differential-algebraic boundary value problems is devoted to the work of S.
Sergey Chuiko +2 more
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On regular operators on Banach Lattices
Acta et Commentationes: Ştiinţe Exacte şi ale Naturii, 2023 Let E and F be Banach lattices and X and Y be Banach spaces. A linear operator T:E->F is called regular if it is the difference of two positive operators. We show that F has a b-property if and only if Lr(E,F) has b-property.
Omer Gok
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Operator upper bounds for Davis-Choi-Jensen's difference in Hilbert spaces [PDF]
Mathematica MoravicaIn this paper we obtain several operator inequalities providing upper bounds for the Davis-Choi-Jensen's Difference Ph (f (A)) - f (Ph (A)) for any convex function f : I → R, any selfadjoint operator A in H with the spectrum Sp (A) ⊂ I and any linear ...
Dragomir Silvestru Sever
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Constrained Controllability of the h-Difference Fractional Control Systems with Caputo Type Operator
Discrete Dynamics in Nature and Society, 2015 The problem of controllability to a given convex target set of linear fractional systems with h-difference fractional operator of Caputo type is studied. Necessary and sufficient conditions of controllability with constrained controllers for such systems
Ewa Pawluszewicz
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Self-adjoint elliptic operators with boundary conditions on not closed hypersurfaces [PDF]
, 2016 The abstract theory of self-adjoint extensions of symmetric operators is used to construct self-adjoint realizations of a second-order elliptic operator on $\mathbb{R}^{n}$ with linear boundary conditions on (a relatively open part of) a compact ...
Mantile, A., Posilicano, A., Sini, M.
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Linear isomorphic spaces of fractional-order difference operators
Alexandria Engineering Journal, 2021 In the present paper, we intend to make an approach to introduce and study the applications of fractional-order difference operators by generating Orlicz almost null and almost convergent sequence spaces. We also show that aforesaid spaces are linearly isomorphic and BK-spaces.
S. A. Mohiuddine +3 more
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