Results 71 to 80 of about 82,097 (123)

Calculating degree-based topological indices of dominating David derived networks

Open Physics, 2017
An important area of applied mathematics is the Chemical reaction network theory. The behavior of real world problems can be modeled by using this theory.
Ahmad Muhammad Saeed, Nazeer Waqas, Kang Shin Min, Imran Muhammad, Gao Wei   +4 more
doaj   +1 more source

Non-commutative geometry, dynamics, and infinity-adic Arakelov geometry [PDF]

, 2003
In Arakelov theory a completion of an arithmetic surface is achieved by enlarging the group of divisors by formal linear combinations of the ``closed fibers at infinity''.
Consani, Caterina, Marcolli, Matilde
core   +1 more source

Analysis of expected value of connectivity indices of random 2T2 kink chains

Frontiers in Physics
In this work, we calculated the product connectivity index of three structures for the T2-type twists and formulated expressions of expected values of the forgotten index, atom bond connectivity index, sum connectivity index, product connectivity index ...
Xuemin Ling, Asima Razzaque, Asima Razzaque, Maham Khalil, Salma Kanwal, Saima Noor, Saima Noor, Robina Nazir, Robina Nazir   +8 more
doaj   +1 more source

On 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. The aim of this paper is to obtain new inequalities involving the geometric-arithmetic index GA1 and characterize graphs extremal with respect to them.
Rodríguez García, José Manuel, Sigarreta Almira, José María   +1 more
openaire   +1 more source

Computation of expected values of some connectivity based topological descriptors of random cyclooctane chains

Scientific Reports
Cyclooctane is a cycloalkane consisting of carbon and hydrogen atoms arranged in a closed ring structure. Cyclooctane chains can be found in various organic compounds and are significant in the field of organic chemistry due to their diverse reactivity ...
Shamaila Yousaf, Zaffar Iqbal, Saira Tariq, Adnan Aslam, Fairouz Tchier, Abudulai Issa   +5 more
doaj   +1 more source

Mathematical study of silicate and oxide networks through Revan topological descriptors for exploring molecular complexity and connectivity

Scientific Reports
Oxide and silicate frameworks, known for their structural adaptability, play a pivotal role in gas storage, drug delivery, electronics, and catalysis. In this study, we explore the structural complexities of silicate and oxide networks through the lens ...
Qun Zhang, Zubair Ahmad, Asad Ullah, Y. S. Hamed, Muzher Saleem, Melaku Berhe Belay   +5 more
doaj   +1 more source

Resolving an Open Problem on the Exponential Arithmetic–Geometric Index of Unicyclic Graphs

Mathematics
Recently, the exponential arithmetic–geometric index (EAG) was introduced. The exponential arithmetic–geometric index (EAG) of a graph G is defined as EAG(G)=∑vivj∈E(G)edi+dj2didj, where di represents the degree of the vertex vi in G.
Kinkar Chandra Das, Jayanta Bera
doaj   +1 more source

Improving the Measurement of Human Development [PDF]

We propose a new Human Development Index that involves a number of changes with respect to the present one, even though it keeps the basic structure of the index (namely, preserving “health”, “education” and “material wellbeing” as the three basic ...
Antonio Villar, Carmen Herrero, Ricardo Martínez   +2 more
core  

Computation of Topological Indices of Some Special Graphs

Mathematics, 2018
There are several chemical indices that have been introduced in theoretical chemistry to measure the properties of molecular topology, such as distance-based topological indices, degree-based topological indices and counting-related topological indices ...
Mohammed Salaheldeen Abdelgader, Chunxiang Wang, Sarra Abdalrhman Mohammed   +2 more
doaj   +1 more source

The virtual cohomology dimension of Teichm\"uller modular groups: the first results and a road not taken

, 2015
The paper is devoted to a detailed exposition of results outlined in author's 1983 note "On the virtual cohomology dimension of the Teichm\"uller modular group".
Ivanov, Nikolai V.
core