Results 31 to 40 of about 2,078,525 (187)

Strong-coupling scales and the graph structure of multi-gravity theories [PDF]

open access: yes, 2016
In this paper we consider how the strong-coupling scale, or perturbative cutoff, in a multi-gravity theory depends upon the presence and structure of interactions between the different fields.
Noller, Johannes, Scargill, James H. C.
core   +2 more sources

Some topological indices of pentagonal double chains [PDF]

open access: yesITM Web of Conferences, 2022
In graph theory, lattices are used when some structural part of the graph repeats itself finitely or infinitely many times. They have applications in complex analysis and geometry in mathematics, and also natural applications in chemical graph theory. As
Mahalank Pushpalatha   +4 more
doaj   +1 more source

Algebraic and combinatorial aspects of sandpile monoids on directed graphs [PDF]

open access: yes, 2012
The sandpile group of a graph is a well-studied object that combines ideas from algebraic graph theory, group theory, dynamical systems, and statistical physics.
Chapman, Scott   +4 more
core   +2 more sources

Further study on forbidden subgraphs of power graph [PDF]

open access: yesarXiv, 2023
The undirected power graph (or simply power graph) of a group $G$, denoted by $P(G)$, is a graph whose vertices are the elements of the group $G$, in which two vertices $u$ and $v$ are adjacent if and only if either $u=v^m$ or $v=u^n$ for some positive integers $m$, $n$. Forbidden subgraph has a significant role in graph theory.
arxiv  

Extremal graph theory and finite forcibility [PDF]

open access: yes, 2017
We study the uniqueness of optimal solutions to extremal graph theory problems. Our main result is a counterexample to the following conjecture of Lov´asz, which is often referred to as saying that “every extremal graph theory problem has a finitely ...
Grzesik, Andrzej   +2 more
core   +1 more source

On the Beta-Number of Forests with Isomorphic Components

open access: yesDiscussiones 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   +3 more
doaj   +1 more source

Expanding Horizons: Graph Theory’s Multifaceted Applications [PDF]

open access: yesE3S 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   +6 more
doaj   +1 more source

Relating graph energy with vertex-degree-based energies [PDF]

open access: yesVojnotehnički Glasnik, 2020
Introduction/purpose: The paper presents numerous vertex-degree-based graph invariants considered in the literature. A matrix can be associated to each of these invariants.
Ivan Gutman
doaj   +1 more source

Comparative Study of Prism Octahedron Network via Eccentric Invariants

open access: yesJournal 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   +5 more
doaj   +1 more source

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