Zobrazeno 1 - 10
of 49
pro vyhledávání: '"SALAS–BROWN, MARGOT"'
Autor:
González, Manuel, Salas-Brown, Margot
Let $SS$ and $SC$ be the strictly singular and the strictly cosingular operators acting between Banach spaces, and let $P\Phi_+$ and $P\Phi_+$ be the perturbation classes for the upper and the lower semi-Fredholm operators. We study two classes of op
Externí odkaz:
http://arxiv.org/abs/2302.04506
Publikováno v:
Demonstratio Mathematica, Vol 57, Iss 1, Pp 201-312 (2024)
We calculate the essential norm of bounded diagonal infinite matrices acting on Köthe sequence spaces. As a consequence of our result, we obtain a recent criteria for the compactness of multiplication operator acting on Köthe sequence spaces.
Externí odkaz:
https://doaj.org/article/2cd50787324b4c8496d362ec740dc697
Publikováno v:
J. Math. Anal. Appl. 489 (2) (2020), 124191
We show that the perturbation class for the upper semi-Fredholm operators between two Banach spaces X and Y coincides with the strictly singular operators when X is subprojective and that the perturbation class for the lower semi-Fredholm operators c
Externí odkaz:
http://arxiv.org/abs/2006.05802
Publikováno v:
Concrete Operators, Vol 10, Iss 1, Pp 297-304 (2023)
In this article, all sequences u{\boldsymbol{u}}, v{\boldsymbol{v}}, and w{\boldsymbol{w}} that define continuous and compact tridiagonal operators Tu,v,w{T}_{u,v,w} acting on the weighted sequence space lβ2{l}_{\beta }^{2} were characterized. Addit
Externí odkaz:
https://doaj.org/article/8ba332af31ee49d6b30c1e3a9efa6e2b
Publikováno v:
Transactions of A. Razmadze Mathematical Institute; Aug2024, Vol. 178 Issue 2, p213-223, 11p
We make an exhaustive study of the properties of multiplication operator $M_u$ acting on K\"othe spaces. We characterize the multiplication operators, acting on K\"othe spaces, which are: bounded, injective, onto, bijective, Fredholm, compact, with c
Externí odkaz:
http://arxiv.org/abs/1411.1018
Publikováno v:
Analysis (0174-4747); May2024, Vol. 44 Issue 2, p85-92, 8p
Publikováno v:
Analysis - International Mathematical Journal of Analysis and its Application; May 2024, Vol. 44 Issue: 2 p85-92, 8p
Publikováno v:
In Journal of Mathematical Analysis and Applications 1 December 2014 420(1):792-800
Autor:
Ramos-Fernandez, Julio C.1 jcramosf@udistrital.edu.co, Salas-Brown, Margot2 margot.salas@urosario.edu.co
Publikováno v:
Proyecciones - Journal of Mathematics. 2020, Vol. 39 Issue 6, p1407-1414. 8p.