Results 41 to 50 of about 367,971 (281)

Tur\'an Graphs, Stability Number, and Fibonacci Index

open access: yes, 2008
The Fibonacci index of a graph is the number of its stable sets. This parameter is widely studied and has applications in chemical graph theory. In this paper, we establish tight upper bounds for the Fibonacci index in terms of the stability number and ...
A. Knopfmacher   +20 more
core   +1 more source

Analytical results on the polymerisation random graph model [PDF]

open access: yes, 2017
The step-growth polymerisation of a mixture of arbitrary-functional monomers is viewed as a time-continuos random graph process with degree bounds that are not necessarily the same for different vertices.
Kryven, Ivan
core   +2 more sources

Application of Chemical Graph Theory for Automated Mechanism Generation [PDF]

open access: yesJournal of Chemical Information and Computer Sciences, 2002
We present an application of the chemical graph theory approach for generating elementary reactions of complex systems. Molecular species are naturally represented by graphs, which are identified by their vertices and edges where vertices are atom types and edges are bonds. The mechanism is generated using a set of reaction patterns (sub-graphs). These
Artur Ratkiewicz, Thanh N. Truong
openaire   +2 more sources

Topological invariants for the line graphs of some classes of graphs

open access: yesOpen Chemistry, 2019
Graph theory plays important roles in the fields of electronic and electrical engineering. For example, it is critical in signal processing, networking, communication theory, and many other important topics.
Zhou Xiaoqing   +5 more
doaj   +1 more source

Topological Properties of Degree-Based Invariants via M-Polynomial Approach

open access: yesJournal of Mathematics, 2022
Chemical graph theory provides a link between molecular properties and a molecular graph. The M-polynomial is emerging as an efficient tool to recover the degree-based topological indices in chemical graph theory.
Samirah Alsulami   +4 more
doaj   +1 more source

Automated prediction of catalytic mechanism and rate law using graph-based reaction-path sampling [PDF]

open access: yes, 2016
In a recent article [J. Chem. Phys., 143, 094106 (2015)], we have introduced a novel graph-based sampling scheme which can be used to generate chemical reaction paths in many-atom systems in an efficient and highly-automated manner. The main goal of this
Allen M. P.   +10 more
core   +1 more source

Metric and Fault-Tolerant Metric Dimension of Hollow Coronoid

open access: yesIEEE Access, 2021
Coronoid systems actually arrangements of hexagons into six sides of benzenoids. By nature, it is an organic chemical structure. Hollow coronoids are primitive and catacondensed coronoids. It is also known as polycyclic conjugated hydrocarbons.
Ali N. A. Koam   +3 more
doaj   +1 more source

The (a,b)-Zagreb index of line graphs of subdivision graphs of some molecular structures

open access: yesInternational Journal of Mathematics for Industry, 2020
A graph is a mathematical model used to predict the topology of a given system. In chemical graph theory, a graph is designed by considering atoms as vertices and edges as bonds between atoms of a particular molecule.
Prosanta Sarkar, Anita Pal, Nilanjan De
doaj   +1 more source

Graph Entropy of Some Special Chemical Graphs

open access: yesمجلة بغداد للعلوم
Chemical graph theory plays an important role in modelling molecules, especially examining physico-chemical properties of the chemical compounds. Alkanes are one of the chemical compounds which are made up of hydrogen and carbon atoms, generally known ...
B. I. Andrew, A Anuradha
doaj   +1 more source

Maximum common subgraph isomorphism algorithms for the matching of chemical structures [PDF]

open access: yes, 2002
The maximum common subgraph (MCS) problem has become increasingly important in those aspects of chemoinformatics that involve the matching of 2D or 3D chemical structures. This paper provides a classification and a review of the many MCS algorithms, both
Raymond, J.W., Willett, P.
core   +2 more sources

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