This article is cited in 4 papers

Diffuse orthogonally additive operators

N. M. Abasov^a, N. A. Dzhusoeva^b, M. A. Pliev<sup>cd

a</sup> Bauman Moscow State Technical University, Moscow, Russia
^b North Ossetian State University after Kosta Levanovich Khetagurov, Vladikavkaz, Russia
^c Southern Mathematical Institute of the Vladikavkaz Scientific Center of the Russian Academy of Sciences, Vladikavkaz, Russia
^d North Caucasus Center for Mathematical Research, Vladikavkaz Scientific Centre of the Russian Academy of Sciences, Vladikavkaz, Russia

Abstract: A regular orthogonally additive operator is a diffuse operator if it is disjoint from all operators in the band generated by the disjointness preserving operators. We present a criterion for principal lateral projections in an order complete vector lattice $E$ to be disjoint. We also state a criterion for a regular orthogonally additive operator to be diffuse. A criterion for the regularity of an integral Urysohn operator acting on ideal spaces of measurable functions is also presented. This criterion is used to show that an integral operator is diffuse. Examples of vector lattices are considered in which the sets of diffuse operators consist only of the zero element. The general form of an order projection operator onto the band generated by the disjointness preserving operators is found.
Bibliography: 47 titles.

Keywords: orthogonally additive operator, regular operator, disjointness preserving operator, diffuse operator, integral Urysohn operator.

MSC: 47H07, 47H30, 47H99, 46A40, 37H10

Received: 13.03.2023 and 06.07.2023

DOI: 10.4213/sm9909

 English version: Sbornik: Mathematics, 2024, 215:1, 1–27

Bibliographic databases:

• 
• 
• 
• 
•