Results 81 to 90 of about 82,097 (123)

A new approximation to the geometric-arithmetic index

, 2017
The concept of geometric-arithmetic index was introduced in the chemical graph theory recently, but it has shown to be useful. The aim of this paper is to obtain new inequalities involving the geometric-arithmetic index $GA_1$ and characterize graphs extremal with respect to them.
Martínez-Pérez, Alvaro, Rodríjuez, José M., Sigarreta, José M.   +2 more
openaire   +2 more sources

The Bias of the RSR Estimator and the Accuracy of Some Alternatives [PDF]

This paper analyzes the implications of cross-sectional heteroskedasticity in repeat sales regression (RSR). RSR estimators are essentially geometric averages of individual asset returns because of the logarithmic transformation of price relatives.
Liang Peng, William N. Goetzmann
core  

Optimal upper bounds of the geometric-arithmetic index

, 2023
The concept of geometric-arithmetic index was introduced in the chemical graph theory recently, but it has shown to be useful. The aim of this paper is to obtain new upper bounds of the geometric-arithmetic index and characterize graphs extremal with respect to them.
Rodríguez García, José Manuel, Sigarreta Almira, José María   +1 more
openaire   +1 more source

Spectral study of the Geometric-Arithmetic Index

, 2015
The concept of geometric-arithmetic index was introduced in the chemical graph theory recently, but it has shown to be useful. One of the main aims of algebraic graph theory is to determine how, or whether, properties of graphs are reected in the algebraic properties of some matrices. The aim of this paper is to study the geometric-arithmetic index GA1
Rodríguez García, José Manuel, Sigarreta Almira, José María   +1 more
openaire   +1 more source

Physico-chemical Properties of Seeds in Valuable Medicinal Species of the Genus Salvia L.

Journal of Medicinal Plants, 2014
Background: The seeds of some medicinal plants and their compounds have long been valued for their numerous health benefits. Objective:To investigate some physical and chemical properties of Salvia spp.
M Tavakoli, H Naghdi Badi, H Rafiee, MR Labbafi, M Ghorbani Nohooji, E Zand, A Mehrafarin   +6 more
doaj  

Sum Geometric Arithmetic Means Index of Graphs

International Journal of Computer Applications, 2022
Sultan Senan Mahde, Muaamar Mohsen Mohsen   +1 more
openaire   +1 more source

New inequalities involving the geometric-arithmetic index

, 2017
URL: http://match.pmf.kg.ac.rs.sabidi.urv.cat/content78n2.htm NO DOI Filiació URV ...
openaire   +1 more source

FOURTH GEOMETRIC ARITHMETIC INDEX OF $NA^{n}_{m}$ NANOTUBE [PDF]

International Journal of Pure and Apllied Mathematics, 2016
M. Rezaei, A.Q. Baig, W. Sajjad, M.R. Farahani   +3 more
openaire   +1 more source

Bounds for The Geometric-Arithmetic Index of a Graph [PDF]

Miskolc Mathematical Notes, 2015
openaire   +2 more sources

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On geometric-arithmetic index

Journal of Mathematical Chemistry, 2009
The geometric-arithmetic (GA) index is a newly proposed graph invariant in mathematical chemistry. We give the lower and upper bounds for GA index of molecular graphs using the numbers of vertices and edges. We also determine the n-vertex molecular trees with the minimum, the second and the third minimum, as well as the second and the third maximum GA ...
Yuan, Yan, Zhou, Bo, Trinajstić, Nenad
openaire   +4 more sources