Results 11 to 20 of about 648,162 (256)
Vertex and region colorings of planar idempotent divisor graphs of commutative rings.
Iraqi Journal for Computer Science and Mathematics, 2022 The idempotent divisor graph of a commutative ring R is a graph with vertices set in R* = R-{0}, and any distinct vertices x and y are adjacent if and only if x.y = e, for some non-unit idempotent element e2 = e ? R, and is denoted by ?(R).
Mohammed Authman +2 more
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Gap-Size-Dependent Effective Phase Transition in Metasurfaces of Closed-Ring Resonators
Crystals, 2021 We theoretically investigate a metal-to-insulator transition in artificial two-dimensional (2D) crystals (i.e., metasurfaces) of tightly coupled closed-ring resonators.
Seojoo Lee, Ji-Hun Kang
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Quasi-Regular Graphs Associated with Commutative Rings
Journal of Mathematics, 2022 One of the most important branches of mathematics is algebraic graph theory, which solves graph problems with algebraic methods. In graph theory, several algebraic properties of a ring can be represented.
Nasr Zeyada +2 more
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Heliyon, 2023 This work uses ab-initio CBS-QB3 and density functional theory (B3LYP) to analyze the structure, stability, and aromaticity of all isosteric nitrogen-boron pyrroles.
Safinaz H. El-Demerdash +3 more
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Communications Physics, 2023 Magnetic materials showing topologically nontrivial quantum states with high tunability is an undoubtedly important topic in condensed matter physics and material science.
Subhadip Pradhan +3 more
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A Multiband Antenna Stacked with Novel Metamaterial SCSRR and CSSRR for WiMAX/WLAN Applications
Micromachines, 2021 This paper presents an innovative method for the design of a triple band meta-mode antenna. This unique design of antenna finds application in a particular frequency band of WLAN and WiMAX.
Rajiv Mohan David +3 more
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Acta Crystallographica Section E: Crystallographic Communications, 2021 The title molecule, C20H15NO3, adopts a Z-shaped conformation with the carboxyl group nearly coplanar with the dihydroquinoline unit. In the crystal, corrugated layers are formed by C—H...O hydrogen bonds and are stacked by C—H...π(ring) interactions ...
Younos Bouzian +5 more
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Broadband graphene-based metamaterial absorbers
AIP Advances, 2018 In this paper, a new type of broadband tunable metamaterial absorber is proposed. The structure consists of a single-layer ring graphene and a metal ground plane separated by a dielectric spacer.
Chang Liu, Limei Qi, Xu Zhang
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A uniqueness theorem for stable homotopy theory [PDF]
, 1999 In this paper we study the global structure of the stable homotopy theory of spectra. We establish criteria for when the homotopy theory associated to a given stable model category agrees with the classical stable homotopy theory of spectra.
Schwede, Stefan, Shipley, Brooke
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8-(Pyridin-2-yl)quinolin-7-ol as a Platform for Conjugated Proton Cranes: A DFT Structural Design
Micromachines, 2020 Theoretical design of conjugated proton cranes, based on 7-hydroxyquinoline as a tautomeric sub-unit, has been attempted by using ground and excited state density functional theory (DFT) calculations in various environments.
Anton Georgiev, Liudmil Antonov
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