Results 11 to 20 of about 45,244 (248)

Two sharp inequalities for operators in a Hilbert space

open access: yesResearches in Mathematics, 2022
In this paper we obtained generalisations of the L. V. Taikov’s and N. Ainulloev’s sharp inequalities, which estimate a norm of function's first-order derivative (L. V. Taikov) and a norm of function's second-order derivative (N.
N.O. Kriachko
doaj   +1 more source

On order continuous norms [PDF]

open access: yesProceedings of the American Mathematical Society, 1999
It is shown that a normed vector lattice ( E , ‖
Leung, D, Chung, SK
openaire   +2 more sources

A Priori and a Posteriori Error Analysis for Generic Linear Elliptic Problems

open access: yesTikrit Journal of Pure Science, 2022
In this paper, a priori error analysis has been examined for the continuous Galerkin finite element method which is used for solving a generic scalar and a generic system of linear elliptic equations.
Hala Raad, Mohammad Sabawi
doaj   +1 more source

On the Lattice Properties of Almost L-Weakly and Almost M-Weakly Compact Operators

open access: yesJournal of Function Spaces, 2021
We establish the domination property and some lattice approximation properties for almost L-weakly and almost M-weakly compact operators. Then, we consider the linear span of positive almost L-weakly (resp., almost M-weakly) compact operators and give ...
Barış Akay, Ömer Gök
doaj   +1 more source

Solution for Second-Order Differential Equation Using Least Square Method

open access: yesEurasian Journal of Science and Engineering, 2022
This paper studies the numerical method for solving differential equations. The continuous least square method (CLSM) is used to obtain the explicit solution for solving ordinary differential equations (ODEs), partial differential equations (PDEs), and ...
Salisu Ibrahim, Abdulnasir Isah
doaj   +1 more source

Order-norm continuous operators and Order weakly compact operators

open access: yes, 2023
Abstract Let E be a sublattice of a vector lattice F. In this paper, we will introduce and study some properties of this new class of operators as F-order-norm continuousoperators and its relationships with some known classifications of operators. We also define the new class of operators that named order weakly compact operators. A continuous
Sajjad Ghanizadeh Zare   +3 more
openaire   +1 more source

On linear sections of orthogonally additive operators

open access: yesМатематичні Студії, 2022
Our first result asserts that, for linear regular operators acting from a Riesz space with the principal projection property to a Banach lattice with an order continuous norm, the $C$-compactness is equivalent to the $AM$-compactness. Next we prove that,
A. Gumenchuk, I. Krasikova, M. Popov
doaj   +1 more source

Beyond ℓ1 sparse coding in V1.

open access: yesPLoS Computational Biology, 2023
Growing evidence indicates that only a sparse subset from a pool of sensory neurons is active for the encoding of visual stimuli at any instant in time.
Ilias Rentzeperis   +3 more
doaj   +1 more source

Weak Compactness of Almost Limited Operators

open access: yesJournal of Function Spaces, 2014
This paper is devoted to the relationship between almost limited operators and weakly compact operators. We show that if F is a σ-Dedekind complete Banach lattice, then every almost limited operator T:E→F is weakly compact if and only if E is reflexive ...
Aziz Elbour   +2 more
doaj   +1 more source

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