Results 91 to 100 of about 4,554,566 (196)

Inverse problem for Zagreb indices

open access: yes, 2018
The inverse problem for integer-valued topological indices is about the existence of a graph having its index value equal to a given integer. We solve this problem for the first and second Zagreb indices, and present analogous results also for the ...
Lokesha, Veerebradiah, Gutman, Ivan
core   +1 more source

Modified Zagreb M2 Index – Comparison with the Randić Connectivity Index for Benzenoid Systems [PDF]

open access: yes, 2003
Two theorems have been derived for benzenoid systems with the following implications: (i) for any arbitrarily large m (e.g., m = 1000000) there is a number n and a set with m benzenoid systems with n vertices so that every pair of them posseses the same ...
Trinajstić, Nenad, Vukičević, Damir
core  

General sum-connectivity index, general product-connectivity index, general Zagreb index and coindices of line graph of subdivision graphs

open access: yes, 2017
The general sum-connectivity index, general product-connectivity index, general Zagreb index and coindices of line graphs of subdivision graphs of tadpole graphs, wheels and ladders have been reported in the literature.
Vinayak V. Manjalapur   +2 more
core   +1 more source

On a Conjecture Concerning the Complementary Second Zagreb Index

open access: yesMatch Communications in Mathematical and in Computer Chemistry
The complementary second Zagreb index of a graph $G$ is defined as $cM_2(G)=\sum_{uv\in E(G)}|(d_u(G))^2-(d_v(G))^2|$, where $d_u(G)$ denotes the degree of a vertex $u$ in $G$ and $E(G)$ represents the edge set of $G$. Let $G^*$ be a graph having the maximum value of $cM_2$ among all connected graphs of order $n$. Furtula and Oz [MATCH Commun.
Saber, Hicham   +4 more
openaire   +3 more sources

1. exposition philatélique croate 1.-8. IX 1907 a Zagreb (Croatie), 4f, Prva Hrvatska filatelistička izložba 1.-8. IX 1907 Zagreb

open access: yes, 1907
1. EXPOSITION PHILATÉLIQUE CROATE 1.-8. IX 1907 A ZAGREB (CROATIE), 4F, PRVA HRVATSKA FILATELISTIČKA IZLOŽBA 1.-8. IX 1907 ZAGREB 1. exposition philatélique croate 1.-8. IX 1907 a Zagreb (Croatie), 4f, Prva Hrvatska filatelistička izložba 1.-8.
Dionička Tiskara, Zagreb
core  

Maximum augmented Zagreb index on polyomino chains

open access: yesApplied Mathematics and Computation
In this paper, we present a dynamic programming approach for identifying extremal polyomino chains with respect to degree-based topological indices. This approach provides an explicit recurrence and constructive algorithm that enables both the computation of an extremal polyomino chain in linear time with respect to its number of squares, and the ...
Manuel Montes-y-Morales   +2 more
openaire   +2 more sources

Reformulated First Zagreb Index of Some Graph Operations

open access: yes, 2015
The reformulated Zagreb indices of a graph are obtained from the classical Zagreb indices by replacing vertex degrees with edge degrees, where the degree of an edge is taken as the sum of degrees of the end vertices of the edge minus 2. In this paper, we
Sk. Nayeem   +3 more
core   +1 more source

Ivo Kerdić (1881-1952): Medals and plaquettes from the Zagreb Archaeological Museum

open access: yes, 2004
IVO KERDIĆ (1881-1953) MEDALS AND PLAQUETTES FROM THE ZAGREB ARCHAEOLOGICAL MUSEUM This exhibition has been conceived to mark the fiftieth anniversary of the death of the great Croatian scupltor and medallist Ivo Kerdić (b.
Mirnik, Ivan
core  

Chemical applicability and predictive potential of certain graphical indices for determining structure-property relationships in polycrystalline acid magenta (C20 H 17N3Na2O9S3)

open access: yesScientific Reports
Acid Magenta, also known as Fuchsine acid, is a polycrystalline material with an anorthic structure that stands out for its eco-friendliness, cost-effectiveness, and versatility.
Jiang-Hua Tang   +5 more
doaj   +1 more source

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