Results 21 to 30 of about 70,314 (307)

Nuclear Space Facts, Strange and Plain

Mathematics, 2016
We present a scenic but practical guide through nuclear spaces and their dual spaces, examining useful, unexpected, and often unfamiliar results both for nuclear spaces and their strong and weak duals.
Jeremy Becnel, Ambar Sengupta
doaj   +1 more source

Orthogonality in smooth countably normed spaces

Journal of Inequalities and Applications, 2021
We generalize the concepts of normalized duality mapping, J-orthogonality and Birkhoff orthogonality from normed spaces to smooth countably normed spaces.
Sarah Tawfeek, Nashat Faried, H. A. El-Sharkawy   +2 more
doaj   +1 more source

Solving dual integral equations on Lebesgue spaces [PDF]

, 2000
We study dual integral equations associated with Hankel transforms, that is, dual integral equations of Titchmarsh's type. We reformulate these equations giving a better description in terms of continuous operators on Lp spaces, and we solve them in ...
Juan Varona, José Guadalupe, Pérez, Mario, Guadalupe, J.J., Mario Pérez, Óscar Ciaurri, Varona, J.L. [0000-0002-2023-9946], Varona, Juan, Ciaurri, O. [0000-0002-1695-3311], Ciaurri, Óscar, Pérez, M. [0000-0002-3050-3712], Guadalupe, José   +11 more
core   +1 more source

The second dual spaces of the sets of Λ-strongly convergent and bounded sequences

International Journal of Mathematics and Mathematical Sciences, 2000
We give the second β-, γ-, and f-duals of the sets w0p(Λ), w∞p(Λ ...
A. M. Jarrah, E. Malkowsky
doaj   +1 more source

On manimax theory in two Hilbert spaces

International Journal of Mathematics and Mathematical Sciences, 1996
In this paper, we investigated the minimax of the bifunction J:H1(Ω)xV2→RmxRn, such that J(v1,v2)=((12a(v1,v1)−L(v1)),v2) where a(.,.) is a finite symmetric bilinear bicontinuous, coercive form on H1(Ω) and L belongs to the dual of H1(Ω).
E. M. El-Kholy, Hanan Ali Abdou
doaj   +1 more source

A Study of Spaces of Sequences in Fuzzy Normed Spaces

Mathematics, 2021
In this paper, spaces of sequences in fuzzy normed spaces are considered. These spaces are a new concept in fuzzy normed spaces. We develop fuzzy norms for spaces of sequences in fuzzy normed spaces. Especially, we study the representation of the dual of
Ju-Myung Kim, Keun-Young Lee
doaj   +1 more source

Continuous $k$-Fusion Frames in Hilbert Spaces [PDF]

Sahand Communications in Mathematical Analysis, 2020
The study of the c$k$-fusions frames shows that the emphasis on the measure spaces introduces a new idea, although some similar properties with the discrete case are raised. Moreover, due to the nature of measure spaces, we have to use new techniques for
Vahid Sadri, Reza Ahmadi, Mohammad Jafarizadeh, Susan Nami   +3 more
doaj   +1 more source

A Study of Approximation Properties in Felbin-Fuzzy Normed Spaces

Mathematics, 2020
In this paper, approximation properties in Felbin-fuzzy normed spaces are studied. These approximation properties have been recently introduced in Felbin-fuzzy normed spaces. We make topological tools to analyze such approximation properties.
Ju Myung Kim, Keun Young Lee
doaj   +1 more source

A weakly Stegall space that is not a Stegall space

, 2002
A topological space X is said to belong to the class of Stegall (weakly Stegall) spaces if for every Baire (complete metric) space B and minimal usco φ : B2X, φ is single-valued at some point of B.
Moors, Warren B., Sivajah Somasundaram, Somasundaram, Sivajah, Warren B. Moors   +3 more
core   +1 more source

Urban Underground Space Planning Idea and Path Based on a “Dual-Use” Concept [PDF]

中国工程科学
As global climate change and urbanization processes accelerate, the risks of compound disasters have significantly increased, rendering traditional disaster prevention facilities inadequate for meeting emergency demands under extreme scenarios. The “dual-
Wei Wang, Junyi Zhu, Guosheng Wang, Xiaodong Guo, Yuan Jiang, Dechun Lu   +5 more
doaj   +1 more source