Fredholm theory for demicompact linear relations

Autor:	Aymen Ammar, Slim Fakhfakh, Aref Jeribi
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	demicompact linear relations fredholm theory block matrix Mathematics QA1-939 Analysis QA299.6-433
Zdroj:	Applied General Topology, Vol 23, Iss 2, Pp 425-436 (2022)
Druh dokumentu:	article
ISSN:	1576-9402 1989-4147
DOI:	10.4995/agt.2022.16940
Popis:	We first attempt to determine conditions on a linear relation T such that μT becomes a demicompact linear relation for each μ ∈ [0,1)(see Theorems 2.4 and 2.5). Second, we display some results on Fredholm and upper semi-Fredholm linear relations involving a demicompact one(see Theorems 3.1 and 3.2). Finally, we provide some results in which a block matrix of linear relations becomes a demicompact block matrix of linear relations (see Theorems 4.2 and 4.3).
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/cde195d5f31a4102b44ff0bfdff68640 Zobrazit plný text záznamu View record in DOAJ Plný text ve formátu PDF