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Minimal Convergence Spaces [PDF]

open access: yesTransactions of the American Mathematical Society, 1971
We are primarily concerned with minimal P {\text {P}} convergence spaces, where P {\text {P}} is one of the following convergence space properties: Hausdorff, T 2 , λ {{\text {T}}_2 ...
Kent, Darrell C., Richardson, G. D.
openaire   +2 more sources

Concrete functors that respect initiality and finality

open access: yesApplied General Topology, 2023
We study concrete endofunctors of the category of convergence spaces and continuous maps that send initial maps to initial maps or final maps to final maps. The former phenomenon turns out to be fairly common while the latter is rare.
Frédéric Mynard
doaj   +1 more source

Multiple Fano resonance excitation of all-dielectric nanoholes cuboid arrays in near infrared region

open access: yesResults in Physics, 2021
High Q factor multiple Fano resonance excitation in all-dielectric metasurfaces has become an effective mode to design high performance optical devices.
Shilin Yu   +5 more
doaj   +1 more source

Ultra-High Quality Factor Resonances in a Pinwheel-Shaped All-Dielectric Metasurface Based on Bound States in the Continuum

open access: yesIEEE Photonics Journal, 2023
Combining with the bound states in the continuum (BICs) theory in all-dielectric metasurfaces has become an extensively used method to excite multiple high quality(Q) factor Fano resonances, which remarkably enhance the performance of structures to be ...
Yan Shi   +4 more
doaj   +1 more source

T0 convergence-approach spaces

open access: yesCommunications Faculty Of Science University of Ankara Series A1Mathematics and Statistics, 2020
Summary: In previous papers, several \(T_0\)-objects in set-based topological category have been introduced and compared. In this paper, we give the characterization of general \(\overline{T_0}\) (resp. \(T_0\), and \(T_0^\prime\)) convergence approach spaces as well as show how these notions are linked to each other.
Baran, Mehmet, Qasim, Muhammad
openaire   +5 more sources

Statistical and Ideal Convergences in Topology

open access: yesMathematics, 2023
The notion of convergence wins its own important part in the branch of Topology. Convergences in metric spaces, topological spaces, fuzzy topological spaces, fuzzy metric spaces, partially ordered sets (in short, posets), and fuzzy ordered sets (in short,
D. Georgiou, G. Prinos, F. Sereti
doaj   +1 more source

A Comprehensive Formalization of Propositional Logic in Coq: Deduction Systems, Meta-Theorems, and Automation Tactics

open access: yesMathematics, 2023
The increasing significance of theorem proving-based formalization in mathematics and computer science highlights the necessity for formalizing foundational mathematical theories. In this work, we employ the Coq interactive theorem prover to methodically
Dakai Guo, Wensheng Yu
doaj   +1 more source

Riesz I–convergent sequence spaces

open access: yesProyecciones (Antofagasta), 2023
In this article we have introduced some new sequence spaces  as a domain of triangular Riesz matrix, and study some of their algebraic and topological properties. Further, our work will devote to argue some inclosions regarding those fore-said sequence spaces.
Khan, Vakeel A., Rahman, Zahid
openaire   +3 more sources

Automatic Detection and Classification of Spread‐F From Ionosonde at Hainan With Image‐Based Deep Learning Method

open access: yesSpace Weather, 2023
An intelligent Spread‐F image detection and classification method is presented in this paper based on an ionogram image set using deep learning models.
Zheng Wang   +7 more
doaj   +1 more source

Convergence S-compactifications

open access: yesApplied General Topology, 2014
Properties of continuous actions on convergence spaces are investigated. The primary focus is the characterization as to when a continuous action on a convergence space can be continuously extended to an action on a compactification of the convergence ...
Bernd Losert, Gary Richardson
doaj   +1 more source

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