Results 281 to 290 of about 148,252 (303)

Complementary Topological Indices

Match Communications in Mathematical and in Computer Chemistry
An edge of a graph can be geometrically represented by points (dr, ds) and (ds,dr) in a 2D coordinate system, where coordinates are, obviously, the degrees of the edge’s end-vertices. Recently, using such a geometrical point of view of a graph edge, a couple of topological invariants were put forward.
Boris Furtula, Mert Sinan Oz
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On topological charge indices of graphs

2023
Summary: We introduce a fast method of computing the topological charge indices of simple graphs (molecules) which does not require matrices of large sizes. For the case of trees, we give a compact formula and in the general case we obtain upper and lower bounds for the charge indices.
Shahryari, Mohammad, VakiliNezhaad, Gholamreza   +1 more
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Some topological indices in fuzzy graphs

Journal of Intelligent & Fuzzy Systems, 2019
A fuzzy graph is one of the versatile application tools in the field of mathematics, which allows the user to easily describe the fuzzy relation between any objects. The nature of fuzziness is favorable for any environment, which supports to predict the problem and solving it.
Shriram Kalathian, Sujatha Ramalingam, Sundareswaran Raman, Narasimman Srinivasan   +3 more
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Computing topological indices of Sudoku graphs

Journal of Applied Mathematics and Computing, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Gao, Wei, Imran, Muhammad, Baig, Abdul Qudair, Ali, Haidar, Farahani, Mohammad Reza   +4 more
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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.
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Relation between Distance-Based Topological Indices

Journal of Chemical Information and Computer Sciences, 2000
The pi-index of the line graph of the molecular graph of an alkane is shown to be related to the pi, Harary, and reciprocal Wiener indices of that alkane. Thus a mathematical relation between several distance-based topological indices is obtained.
I, Gutman, Z, Tomović
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Resolving topological indices of graphs

2022
Sooryanarayana, Badekara, Chandrakala, Sogenahalli, Roshini, Gujar Ravichandra, Kumar, Mallappa   +3 more
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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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Topological indices of certain graphs

2022
Shahni Karamzadeh, Negur, Darafsheh, Mohammad Reza   +1 more
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Topological Indices for Structure-Activity Correlations

1983
This chapter deals with the description of the main topological indices and of related indicatros for molecular constitution used in structure-activity relationships (QSAR). The topological indices are numerical quantities based on various invariants or characteristics of molecular graphs.
Alexandru T. Balaban, Ioan Motoc, Danail Bonchev, Ovanes Mekenyan   +3 more
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