Results 301 to 310 of about 23,816 (337)
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Topological Indices:  Their Nature and Mutual Relatedness

Journal of Chemical Information and Computer Sciences, 2000
We calculated 202 molecular descriptors (topological indices, TIs) for two chemical databases (a set of 139 hydrocarbons and another set of 1037 diverse chemicals). Variable cluster analysis of these TIs grouped these structures into 14 clusters for the first set and 18 clusters for the second set.
Subhash C. Basak   +3 more
openaire   +2 more sources

On Interpretation of Well-Known Topological Indices

Journal of Chemical Information and Computer Sciences, 2001
Many topological indices lack an interpretation in terms of simple physicochemical quantities. We have reexamined the structural interpretation of well-known topological indices: the connectivity index (1)chi, the Wiener index W, and the Hosoya topological index Z.
Milan Randic, Jure Zupan
openaire   +2 more sources

On Topological Indices of Graph Transformation

International Journal of Applied and Computational Mathematics, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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More on Topological Indices and Their Reciprocals

MATCH – Communications in Mathematical and in Computer Chemistry
Summary: We show how Schwitzer inequality allows us to find inequalities relating an additive descriptor of the form \(D_p(G)=\sum_{i=1}^N c_i^p\) to its reciprocal \(D_{-p}(G)=\sum_{i=1}^N c_i^{-p}\). We look at three cases (the inverse degree, the Kirchhoff, and the multiplicative degree-Kirchhoff indices) where \(p=1\) and where, of the two \(D_1(G)\
openaire   +2 more sources

Generalization of topological indices

Chemical Physics Letters, 2001
A generalized (molecular) graph-theoretical matrix is introduced in such a way that the adjacency and distance matrices of (molecular) graphs are particular cases of it. By using this matrix, two new molecular graph-theoretical vectors and a vector–matrix–vector multiplication procedure, a generalized invariant is introduced.
openaire   +1 more source

Topological indices of a kind of Altans

2021
Salimi, Shima, Iranmanesh, Ali
openaire   +1 more source

Graph entropies of porous graphene using topological indices

Computational and Theoretical Chemistry, 2021
M C Shanmukha, A Usha
exaly  

Resolving topological indices of graphs

2022
Sooryanarayana, Badekara   +3 more
openaire   +2 more sources

Topological indices of certain graphs

2022
Shahni Karamzadeh, Negur   +1 more
openaire   +1 more source

M-polynomials and degree-based topological indices of tadpole graph

Journal of Discrete Mathematical Sciences and Cryptography, 2021
Faryal Chaudhry   +2 more
exaly  

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