Results 31 to 40 of about 722,873 (188)

Topological Indices of Pent-Heptagonal Nanosheets via M-Polynomials

open access: yesJournal of Mathematics, 2021
The combination of mathematical sciences, physical chemistry, and information sciences leads to a modern field known as cheminformatics. It shows a mathematical relationship between a property and structural attributes of different types of chemicals ...
Hafiza Bushra Mumtaz   +3 more
doaj   +1 more source

Smarandache-Zagreb Index on Three Graph Operators [PDF]

open access: yes, 2010
Many researchers have studied several operators on a connected graph in which one make an attempt on subdivision of its edges. In this paper, we show how the Zagreb indices, a particular case of Smarandache-Zagreb index of a graph changes with these ...
Ranjini, P.S., Lokesha, V.
core   +1 more source

On topological polynomials and indices for metal-organic and cuboctahedral bimetallic networks

open access: yesMain Group Metal Chemistry, 2022
A molecular graph consists of bonds and atoms, where atoms are present as vertices and bonds are present as edges. We can look at topological invariants and topological polynomials that furnish bioactivity and physio-chemical features for such molecular ...
Yasmeen Farhana   +4 more
doaj   +1 more source

The unofficial economy in Croatia: causes, size and consequences [PDF]

open access: yes, 1997
This Occasional Paper reports the research results of a project on the unofficial economy in Croatia conducted by the Institute of Public Finance in Zagreb for the Croatian Ministry of Finance.
Bicanic, Ivo   +3 more
core   +1 more source

Zagreb Connection Indices of Molecular Graphs Based on Operations

open access: yesComplexity, 2020
Topological index (numeric number) is a mathematical coding of the molecular graphs that predicts the physicochemical, biological, toxicological, and structural properties of the chemical compounds that are directly associated with the molecular graphs ...
Jinde Cao   +3 more
doaj   +1 more source

Topology-Based Analysis of OTIS (Swapped) Networks OKn and OPn

open access: yesJournal of Chemistry, 2019
In the fields of chemical graph theory, topological index is a type of a molecular descriptor that is calculated based on the graph of a chemical compound. In this paper, M-polynomial OKn and OPn networks are computed.
Hai-Xia Li   +2 more
doaj   +1 more source

Eccentricity-Based Topological Indices of a Cyclic Octahedron Structure

open access: yesMathematics, 2018
In this article, we study the chemical graph of a cyclic octahedron structure of dimension n and compute the eccentric connectivity polynomial, the eccentric connectivity index, the total eccentricity, the average eccentricity, the first Zagreb index ...
Manzoor Ahmed Zahid   +3 more
doaj   +1 more source

Bounds on Szeged and PI Indexes in terms of Second Zagreb Index [PDF]

open access: yes, 2012
In this short note, we studied the vertex version and the edge version of the Szeged index and the PI index and obtained bounds for these indices in terms of the Second Zagreb index.
Ranjini P.S.   +2 more
core   +1 more source

Topological Indices of Graphs from Vector Spaces

open access: yesMathematics, 2023
Topological indices are numbers that are applied to a graph and can be used to describe specific graph properties through algebraic structures. Algebraic graph theory is a helpful tool in a range of chemistry domains.
Krishnamoorthy Mageshwaran   +3 more
doaj   +1 more source

Are physician-patient communication practices slowly changing in Croatia? – a cross-sectional questionnaire study [PDF]

open access: yes, 2013
Aim To explore physician-patient communication practices during the process of obtaining informed consent in a hospital setting in Croatia. Methods Two hundred and fifty patients (response rate 78%) from five tertiary level hospitals in Zagreb ...
Borovečki, Ana   +4 more
core   +1 more source

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