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Cohyponormal operators with the single valued extension property

International Journal of Mathematics and Mathematical Sciences, Volume 9, Issue 4, Page 659-663, 1986., 1986
It is proved that in order to find a nontrivial hyperinvariant subspace for a cohyponormal operator it suffices to make the further assumption that the operator have the single‐valued extension property.
Ridgley Lange, Shengwang Wang
wiley +1 more source

Spectral Properties of Nonhomogenous Differential Equations with Spectral Parameter in the Boundary Condition

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014
In this paper, using the boundary properties of the analytic functions we investigate the structure of the discrete spectrum of the boundary value problem (0.1)iy1'+q1(x)y2−λy1=ϕ1(x) −iy2'+q2(x)y1−λy2=ϕ2(x),x∈R+$$\matrix{\hfill {iy_1^\prime + q_1 \left ...
Karaman Özkan
doaj +1 more source

The Kluvanek‐Kantorovitz characterization of scalar operators in locally convex spaces

International Journal of Mathematics and Mathematical Sciences, Volume 5, Issue 2, Page 345-349, 1982., 1982
This paper is devoted to a proof of the characterization without duality theory, using strong integrals, while eliminating any assumptions of barrelledness or equicontinuity.
William V. Smith
wiley +1 more source

New forms of bilateral inequalities for K-g-frames

Demonstratio Mathematica
In this work, several bilateral inequalities for KK-gg-frames in subspaces are established, drawing support from two kinds of operators induced, respectively, by the KK-gg-frame itself and the KK-dual pair, which, compared with previous ones concerning ...
Xiang Zhong-Qi
doaj +1 more source

Existence and attractivity results on semi-infinite intervals for integrodifferential equations with non-instantaneous impulsions in Banach spaces

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica
In this article, we study the existence of mild solutions of a non-instantaneous integrodi erential equations on unbounded domain via resolvent operators in Banach space. For our proofs, we employ the semigroups theory and Schauder’s fixed point theorem.
Bensalem Abdelhamid +3 more
doaj +1 more source

The modified split generalized equilibrium problem for quasi-nonexpansive mappings and applications. [PDF]