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First we characterize the Banach lattices E whose biduals have the positive Schur property by means of second adjoints of operators on E being almost Dunford-Pettis. Next we extend some known results concerning conditions on the Banach…

泛函分析 · 数学 2024-10-02 Geraldo Botelho , Luis Alberto Garcia

By introducing the concepts of order almost Dunford-Pettis and almost weakly limited operators in Banach lattices, we give some properties of them related to some well known classes of operators, such as, order weakly compact, order…

泛函分析 · 数学 2015-02-03 H. Ardakani , S. M. S. Modarres Mosadegh

We introduce and study the class of weak almost limited operators. We establish a characterization of pairs of Banach lattices $E$, $F$ for which every positive weak almost limited operator $T:E\rightarrow F$ is almost limited (resp. almost…

泛函分析 · 数学 2014-03-18 A. Elbour , N. Machrafi , M. Moussa

We study (almost) limited operators in Banach lattices and their relations to L-weakly compact, semi-compact, and Dunford-Pettis operators. Several further related topics are investigated.

泛函分析 · 数学 2025-02-14 Safak Alpay , Svetlana Gorokhova

In this paper, we characterize Banach lattices on which each Dunford-Pettis operator (or weak Dunford-Pettis) is unbounded absolute weak Dunford-Pettis operator and the converse.

泛函分析 · 数学 2020-06-23 Hui Li , Zili Chen

We give some new characterizations of almost weak Dunford-Pettis operators and we investigate their relationship with weak Dunford-Pettis operators.

泛函分析 · 数学 2016-10-14 Nabil Machrafi , Aziz Elbour , Mohammed Moussa

In this paper, almost Dunford-Pettis operators with ranges in $c_0$ are used to identify totally bounded sets in the absolute weak topology. That is, a bounded subset $A$ of a Banach lattice $E$ is $|\sigma|(E,E^\prime)$-totally bounded if…

泛函分析 · 数学 2024-06-14 Halimeh Ardakani , Jin Xi Chen

We introduce and study the enveloping norms of regularly P-operators, where P is an "almost" version of limited, Grothendieck, and of Dunford--Pettis operators in Banach lattices. Several further topics related to these operators are also…

泛函分析 · 数学 2022-11-18 Safak Alpay , Eduard Emelyanov , Svetlana Gorokhova

In this paper, we present some necessary and sufficient conditions for semi-compact operators being almost L-weakly compact (resp. almost M-weakly compact) and the converse. Mainly, we prove that if $X$ is a nonzero Banach space, then every…

泛函分析 · 数学 2019-04-24 Hui Li , Zili Chen

In this paper we introduce and study a new class of operators related to norm bounded sets on Banach Lattice and which brings together several classical classes of operators (as o-weakly compact operators, b-weakly compact operators,…

泛函分析 · 数学 2022-09-27 Hassan Khabaoui , Jawad H'michane , Kamal Elfahri

This paper introduces and investigates novel properties of uaw-Dunford-Pettis operators on Banach spaces, exploring their relationships with other classes of operators. We further define and characterize new property of Banach lattices.…

泛函分析 · 数学 2026-04-21 Sanaa Boumnidel , Noufissa Hafidi

We introduce and study the class of almost limited sets in Banach lattices, that is, sets on which every disjoint weak$^{*}$ null sequence of functionals converges uniformly to zero. It is established that a Banach lattice has order…

泛函分析 · 数学 2013-09-10 Jin Xi Chen , Zi Li Chen , Guo Xing Ji

In this article, the class of all Dunford-Pettis $ p $-convergent operators and $ p $-Dunford-Pettis relatively compact property on Banach spaces are investigated. Moreover, we give some conditions on Banach spaces $ X $ and $ Y $ such that…

泛函分析 · 数学 2019-05-06 M. Alikhani

We give a positive answer to the question of K. Bouras [`Almost Dunford-Pettis sets in Banach lattices', \textit{Rend. Circ. Mat. Palermo (2)} \textbf{ 62} (2013), 227--236] concerning weak compactness of almost Dunford-Pettis sets in…

泛函分析 · 数学 2016-09-23 Jin Xi Chen , Lei Li

Recently, J. H'michane et al. introduced the class of weak* Dunford-Pettis operators on Banach spaces, that is, operators which send weakly compact sets onto limited sets. In this paper the domination problem for weak* Dunford-Pettis…

泛函分析 · 数学 2019-02-20 Jin Xi Chen , Zi Li Chen , Guo Xing Ji

Several recent papers were devoted to various modifications of limited, Grothendieck, and Dunford--Pettis operators, etc., through involving the Banach lattice structure. In the present paper, it is shown that many of these operators appear…

泛函分析 · 数学 2022-09-07 Eduard Emelyanov , Svetlana Gorokhova

We introduce a class of operators which is called unbounded Dunford-Pettis. In this paper, we study some properties of the operators, relationships with the other classes of operators and the space of these operators.

泛函分析 · 数学 2019-09-25 Wang Zhangjun , Chen Zili , Chen Jinxi , Ouyang Miao

We study operators carrying disjoint bounded subsets of a Banach lattice into compact, weakly compact, and limited subsets of a Banach space. Surprisingly, these operators behave differently with classical compact, weakly compact, and…

泛函分析 · 数学 2024-10-01 Eduard Emelyanov , Nazife Erkurşun-Özcan , Svetlana Gorokhova

First we give conditions on a Banach lattice $E$ so that an operator $T$ from $E$ to any Banach space is disjoint $p$-convergent if and only if $T$ is almost Dunford-Pettis. Then we study when adjoints of positive operators between Banach…

泛函分析 · 数学 2023-09-22 Geraldo Botelho , Luis Alberto Garcia , Vinícius C. C. Miranda

In this paper, we will address broader concepts for Dunford-Pettis operators, presenting new classes and results that correlate this class with others already well-studied in the literature, as well as an approach outside the origin. We…

泛函分析 · 数学 2026-04-02 Joilson Ribeiro , Fabricio Santos
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