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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…

Functional Analysis · Mathematics 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…

Functional Analysis · Mathematics 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…

Functional Analysis · Mathematics 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.

Functional Analysis · Mathematics 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.

Functional Analysis · Mathematics 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.

Functional Analysis · Mathematics 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…

Functional Analysis · Mathematics 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…

Functional Analysis · Mathematics 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…

Functional Analysis · Mathematics 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,…

Functional Analysis · Mathematics 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.…

Functional Analysis · Mathematics 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…

Functional Analysis · Mathematics 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…

Functional Analysis · Mathematics 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…

Functional Analysis · Mathematics 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…

Functional Analysis · Mathematics 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…

Functional Analysis · Mathematics 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.

Functional Analysis · Mathematics 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…

Functional Analysis · Mathematics 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…

Functional Analysis · Mathematics 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…

Functional Analysis · Mathematics 2026-04-02 Joilson Ribeiro , Fabricio Santos
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