Results 51 to 60 of about 54,610 (362)
On Computation Degree-Based Topological Descriptors for Planar Octahedron Networks
Journal of Mathematics, 2021 A molecular graph is used to represent a chemical molecule in chemical graph theory, which is a branch of graph theory. A graph is considered to be linked if there is at least one link between its vertices.
Wang Zhen +4 more
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Structure peculiarities of cementite and their influence on the magnetic characteristics
, 2006 The iron carbide $Fe_3C$ is studied by the first-principle density functional theory. It is shown that the crystal structure with the carbon disposition in a prismatic environment has the lowest total energy and the highest energy of magnetic anisotropy ...
A K Arzhnikov +13 more
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Chemistry of Materials, 2019 We devised a colloidal approach for the synthesis of CsPbBr3 nanocrystals (NCs) in which the only ligands employed are alkyl phosphonic acids. Compared to more traditional syntheses of CsPbBr3 NCs, the present scheme delivers NCs with the following ...
Baowei Zhang +9 more
semanticscholar +1 more source
Crystals, 2023 This study explores the use of Cu dopant to improve the optoelectronic properties and stability of CsPbX3 perovskites for blue-light-emitting diode material.
Yinuo Ma +7 more
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A necessary flexibility condition of a nondegenerate suspension in Lobachevsky 3-space [PDF]
, 2012 We show that some combination of the lengths of all edges of the equator of a flexible suspension in Lobachevsky 3-space is equal to zero (each length is taken either positive or negative in this combination).Comment: 20 pages, 13 ...
A. V. Bitsadze +9 more
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Dipotassium dialuminium cyclooctaphosphate
Acta Crystallographica Section E, 2010 Single crystals of the title compound, K2Al2P8O24, were obtained by solid-state reaction. The monoclinic structure is isotypic with that of the GaIII analogue and is built of eight-membered phosphate ring anions P8O248− (2/m symmetry) isolated ...
Abdelghani Oudahmane +2 more
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On Topological Properties for Benzenoid Planar Octahedron Networks
Molecules, 2022 Chemical descriptors are numeric numbers that capture the whole graph structure and comprise a basic chemical structure. As a topological descriptor, it correlates with certain physical aspects in addition to its chemical representation of underlying ...
Jia-Bao Liu +4 more
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Ranking the facets of the octahedron
Discrete Mathematics, 1972 AbstractThis paper describes a procedure for ranking the facets of the n-dimensional (regular) octahedron in the order in which they are intersected by a halfline. The problem discussed here arise, in the context of integer programming via convex analysis (or intersection cuts).
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Eccentricity-Based Topological Indices of a Cyclic Octahedron Structure
Mathematics, 2018 In this article, we study the chemical graph of a cyclic octahedron structure of dimension n and compute the eccentric connectivity polynomial, the eccentric connectivity index, the total eccentricity, the average eccentricity, the first Zagreb index ...
Manzoor Ahmed Zahid +3 more
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Homology Of A Type Of Octahedron
, 2018 Homology classes were first defined rigorously by Henri Poincar´e in his seminal paper “Analysis situs” in 1895 referring to the work of Riemann,Betti and von Dyck. The homology group was further developed by Emmy Noether and, independently, by Leopold Vietoris and Walther Mayer in the period 1925-28.
Shouvik Datta Choudhury +2 more
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