Results 31 to 40 of about 142,607 (267)

The Determinant of Matching Matrix in the Evaluation of Matching Polynomial

open access: yesRevista de Matemática: Teoría y Aplicaciones, 2011
A characterization is given for graphs whose matching polynomial is the determinant of their matching matrices. The matching matrix is then modified and its relation with other graph polynomials is examined.
Shanaz A. Wahid
doaj   +1 more source

Problem-based scaffolding for prospective mathematics teachers in graph theory course

open access: yesInternational Journal of Trends in Mathematics Education Research, 2023
This study aimed to give a scaffolding process to improve the preservice teachers' ability in graph theory class. The present study implemented scaffolding techniques by administering graph theory questions.
Yunita Oktavia Wulandari   +2 more
doaj   +1 more source

Graph lambda theories

open access: yesMathematical Structures in Computer Science, 2008
A longstanding open problem in lambda calculus is whether there exist continuous models of the untyped lambda calculus whose theory is exactly the λβ or the least sensible λ-theory ℋ (which is generated by equating all the unsolvable terms). A related question is whether, given a class of lambda models, there are a minimal λ-theory and a minimal ...
BUCCIARELLI A, SALIBRA, Antonino
openaire   +4 more sources

Application of practice-based learning in graph theory

open access: yesInternational Journal of Trends in Mathematics Education Research, 2023
Learning graph theory is an important topic in the world of mathematics and computer science. However, students often face difficulties in understanding the concepts and practical application of graph theory. Therefore, this study aims to apply practicum-
Marhadi Saputro, Iwit Prihatin
doaj   +1 more source

Odd harmonious labeling on the amalgamation of the generalized double quadrilateral windmill graph

open access: yesDesimal, 2021
Graph labeling is one of the topics of graph theory that is growing very rapidly both in terms of theory and application. A graph that satisfies the labeling property of odd harmonious is called an odd harmonious graph.
Fery Firmansah, Wed Giyarti
doaj   +1 more source

On the Ideal Theory of Graphs

open access: yesJournal of Algebra, 1994
If \(k\) is a field and \(G\) is a graph on a vertex set \(\{v_ 1, \dots, v_ n\}\), then the edge ideal \(I = I(G) \subset R = k[x_ 1, \dots, x_ n]\) is generated by all \(x_ ix_ j\) such that \(v_ iv_ j\) is an edge of \(G\). We shall assume there are no edges of type \(v_ iv_ i\), so \(I\) is square-free and \(R/I\) is a special case of a face ring ...
Simis, Aron   +2 more
openaire   +2 more sources

THE INTERSECTION GRAPH REPRESENTATION OF A DIHEDRAL GROUP WITH PRIME ORDER AND ITS NUMERICAL INVARIANTS

open access: yesBarekeng, 2022
One of the concepts in mathematics that developing rapidly today is Graph Theory. The development of Graph Theory has been combined with Group Theory, that is by representing a group in a graph.
Dewi Santri Ramdani   +2 more
doaj   +1 more source

Density-functional theory on graphs [PDF]

open access: yesThe Journal of Chemical Physics, 2021
The principles of density-functional theory are studied for finite lattice systems represented by graphs. Surprisingly, the fundamental Hohenberg–Kohn theorem is found void, in general, while many insights into the topological structure of the density-potential mapping can be won.
Penz, Markus, van Leeuwen, Robert
openaire   +5 more sources

On Total H-Irregularity Strength of the Disjoint Union of Graphs

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

Exploring the Power of Graph Theory in Hadron Theory: From Bound States to Quark Systems

open access: yesIndonesian Journal of Combinatorics, 2023
The article discusses how graph theory has been utilized in hadron theory for high energy interactions in recent years. The paper emphasizes the significance of a visual perspective throughout the discussion and explores how graph theory can aid in ...
M. Abu-shady
doaj   +1 more source

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