Zobrazeno 1 - 10
of 173
pro vyhledávání: '"Fernández, Julio C."'
Autor:
Reyes, Christian1 (AUTHOR) christian.reyes@cinvestav.mx, Ramos-Fernández, Julio C.2 (AUTHOR) jramos@upp.edu.mx, Espinoza, Eduardo S.1,3 (AUTHOR) eduardo.espinoza@cinvestav.mx, Lozano, Rogelio1 (AUTHOR) rogelio.lozano@cinvestav.mx
Publikováno v:
Algorithms. Sep2024, Vol. 17 Issue 9, p391. 16p.
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:
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
Akademický článek
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Publikováno v:
Open Mathematics, Vol 19, Iss 1, Pp 492-504 (2021)
In this paper, the functions u∈BVφ[0,1]u\in B{V}_{\varphi }\left[0,1] which define compact and Fredholm multiplication operators Mu{M}_{u} acting on the space of functions of bounded φ\varphi -variation are studied. All the functions u∈BVφ[0,1
Externí odkaz:
https://doaj.org/article/093254f3df2e4163b67462802c2b5e21
Autor:
Sanabria, José E.1 (AUTHOR) jesanabri@gmail.com, Ramos-Fernández, Julio C.2 (AUTHOR) jcramosf@udistrital.edu.co, Sánchez C., Rainier V.3 (AUTHOR) rainiersan76@gmail.com
Publikováno v:
International Journal of Geometric Methods in Modern Physics. Aug2024, p1. 30p.
Akademický článek
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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
In this article, we estimate the essential norm of weighted composition operator $W_{u, \varphi}$, acting on the logarithmic Bloch space $\mathcal{B}^{v_{\log}}$, in terms of the $n$-power of the analytic function $\varphi$ and the norm of the $n$-po
Externí odkaz:
http://arxiv.org/abs/1409.3281
Publikováno v:
Banach Journal of Mathematical Analysis, vol 9 (2015), no.1, pp. 144-158
For an almost radial and typical weight $v$, we characterize the continuity and compactness of the weighted composition operator $u C_{\varphi}$ acting on the weighted Banach spaces of analytic functions $H_{v}^{\infty}$ in terms of the $n$th power o
Externí odkaz:
http://arxiv.org/abs/1309.5016