Results 41 to 50 of about 273,375 (330)

Mathematical aspects and topological properties of two chemical networks

open access: yesAIMS Mathematics, 2023
Graphs give a mathematical model of molecules, and thery are used extensively in chemical investigation. Strategically selections of graph invariants (formerly called "topological indices" or "molecular descriptors") are used in the mathematical modeling
Ali Al Khabyah
doaj   +1 more source

Topological Interference Management Through Index Coding [PDF]

open access: yesIEEE Transactions on Information Theory, 2014
This work studies linear interference networks, both wired and wireless, with no channel state information at the transmitters (CSIT) except a coarse knowledge of the end-to-end one-hop topology of the network that only allows a distinction between weak (zero) and significant (non-zero) channels and no further knowledge of the channel coefficients ...
openaire   +3 more sources

Tutorial: Topology, Waves, and the Refractive Index

open access: yesInternational Journal of Theoretical Physics, 2023
AbstractThis tutorial is divided into two parts: the first examines the application of topology to problems in wave physics. The origins of the Chern number are reviewed, where it is shown that this counts the number of critical points of a complex tangent vector field on the surface.
openaire   +2 more sources

Degree-Based Topological Indices of Boron B12

open access: yesJournal of Chemistry, 2021
Topological index sometimes called molecular descriptor is a numerical value which associates a chemical composition for correlating chemical structure with numerous physical properties, chemical reactivity, or biological activity.
Nouman Saeed   +4 more
doaj   +1 more source

Factorising the 3D topologically twisted index [PDF]

open access: yesJournal of High Energy Physics, 2017
Exploramos la integración de rutas, sobre el contorno de configuraciones de campos hermíticas (no auxiliares), de $$ \mathcal{N}=2 $$ Teoría de la materia de Chern-Simons (TTCSM) topológicamente retorcida en $$ {\mathbb{S}}_2 $$ veces por segmento.
openaire   +4 more sources

Comparative study of topological charge [PDF]

open access: yes, 2015
Comparative study of topological charge is performed. Topological charges are measured by a cloverleaf operator on smoothed gauge configurations. Various types of smoothing techniques are employed.
Namekawa, Yusuke
core   +1 more source

Relating the ABC and harmonic indices [PDF]

open access: yesJournal of the Serbian Chemical Society, 2014
The atom-bond connectivity (ABC) index is a much-studied molecular structure descriptor, based on the degrees of the vertices of the molecular graph.
Gutman Ivan, Zhong Lingping, Xu Kexiang
doaj   +1 more source

Determining topological order from a local ground state correlation function

open access: yes, 2011
Topological insulators are physically distinguishable from normal insulators only near edges and defects, while in the bulk there is no clear signature to their topological order.
E. M. Lifshitz   +3 more
core   +1 more source

Topological Indices of H-Naphtalenic Nanosheet

open access: yesOpen Chemistry, 2018
In chemical graph theory, a single numeric number related to a chemical structure is called a topological descriptor or topological index of a graph.
Idrees Nazeran   +4 more
doaj   +1 more source

Majorana zero modes bound to a vortex line in a topological superconductor

open access: yes, 2010
We explore Majorana zero modes bound to a vortex line in a three dimensional topological superconductor model, focusing our attention on the validity of the index theorem previously derived.
Fukui, T.
core   +1 more source

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