Results 21 to 30 of about 1,392,860 (268)

Graph Theory: A Lost Component For Development in Nigeria

Journal of Nigerian Society of Physical Sciences, 2022
Graph theory is one of the neglected branches of mathematics in Nigeria but with the most applications in other fields of research. This article shows the paucity, importance, and necessity of graph theory in the development of Nigeria.
Olayiwola Babarinsa
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On Total H-Irregularity Strength of the Disjoint Union of Graphs

Discussiones Mathematicae Graph Theory, 2020
A simple graph G admits an H-covering if every edge in E(G) belongs to at least to one subgraph of G isomorphic to a given graph H. For the subgraph H ⊆ G under a total k-labeling we define the associated H-weight as the sum of labels of all vertices and
Ashraf Faraha, López Susana Clara, Muntaner-Batle Francesc Antoni, Oshima Akito, Bača Martin, Semaničová-Feňovčíková Andrea   +5 more
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Graph-based linear scaling electronic structure theory [PDF]

, 2016
We show how graph theory can be combined with quantum theory to calculate the electronic structure of large complex systems. The graph formalism is general and applicable to a broad range of electronic structure methods and materials, including ...
Bock, Nicolas, Cawkwell, Marc J., Djidjev, Hristo, Germann, Timothy C., Mniszewski, Susan M., Mohd-Yusof, Jamal, Negre, Christian F. A., Niklasson, Anders M. N., Rubensson, Emanuel H., Swart, Pieter J., Wall, Michael E.   +10 more
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Elusive extremal graphs [PDF]

, 2020
We study the uniqueness of optimal solutions to extremal graph theory problems. Lovasz conjectured that every finite feasible set of subgraph density constraints can be extended further by a finite set of density constraints so that the resulting set is ...
Grzesik, Andrzej, Král', Daniel, Lovász, László Miklós   +2 more
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The Box Graph In Superstring Theory [PDF]

, 1994
In theories of closed oriented superstrings, the one loop amplitude is given by a single diagram, with the topology of a torus. Its interpretation had remained obscure, because it was formally real, converged only for purely imaginary values of the ...
Amano, Amano, Aoki, Berera, Berera, Berkovits, Berkovits, Bjorken, Chew, Chiu, D'Hoker, D'Hoker, D'Hoker, D'Hoker, D'Hoker, D.H. Phong, Eden, Eric D'Hoker, Green, Green, Green, Gross, Gross, Gross, Hata, Itzykson, Mandelstam, Mandelstam, Mandelstam, Mandelstam, Marcus, Martinec, Miranski, Mitchell, Mitchell, Montag, Montag, Moore, Polchinski, Polyakov, Sundborg, Todorov, Zwiebach, Zwiebach   +43 more
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Group actions and coverings of Brauer graph algebras [PDF]

, 2012
We develop a theory of group actions and coverings on Brauer graphs that parallels the theory of group actions and coverings of algebras. In particular, we show that any Brauer graph can be covered by a tower of coverings of Brauer graphs such that the ...
Green, Edward L, Schroll, Sibylle, Snashall, Nicole   +2 more
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Solutions of Detour Distance Graph Equations

Sensors, 2022
Graph theory is a useful mathematical structure used to model pairwise relations between sensor nodes in wireless sensor networks. Graph equations are nothing but equations in which the unknown factors are graphs.
S. Celine Prabha, M. Palanivel, S. Amutha, N. Anbazhagan, Woong Cho, Hyoung-Kyu Song, Gyanendra Prasad Joshi, Hyeonjoon Moon   +7 more
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On the Beta-Number of Forests with Isomorphic Components

Discussiones Mathematicae Graph Theory, 2018
The beta-number, β (G), of a graph G is defined to be either the smallest positive integer n for which there exists an injective function f : V (G) → {0, 1, . . .
Ichishima Rikio, López Susana-Clara, Muntaner-Batle Francesc Antoni, Oshima Akito   +3 more
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Expanding Horizons: Graph Theory’s Multifaceted Applications [PDF]

E3S Web of Conferences
A subfield of mathematics called graph theory studies networks of points interconnected by lines. Researchers may model and examine the structure of a network using graph theory.
Saxena Abhishek, V Asha, Lalitha G., Khangar Vipin, Praveen, Tyagi Lalit Kumar, Almusawi Muntather   +6 more
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Comparative Study of Prism Octahedron Network via Eccentric Invariants

Journal of Chemistry, 2023
Topological indices are empirical features of graphs that characterize the topology of the graph and, for the most part, are graph independent. An important branch of graph theory is chemical graph theory.
Haidar Ali, Didar Abdulkhaleq Ali, Muhammad Nadeem, Parvez Ali, Syed Ajaz K. Kirmani, Mohamed Sesay   +5 more
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