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1.
Some remarks on Balaban and sum-Balaban index
Martin Knor, Jozef Komorník, Riste Škrekovski, Aleksandra Tepeh, 2020, original scientific article

Abstract: In the paper we study maximal values of Balaban and sum-Balaban index, and correct some results appearing in the literature which are only partially correct. Henceforth, we were able to solve a conjecture of M. Aouchiche, G. Caporossi and P. Hansen regarding the comparison of Balaban and Randić index. In addition, we showed that for every k and large enough n, the first k graphs of order n with the largest value of Balaban index are trees. We conclude the paper with a result about the accumulation points of sum-Balaban index.
Keywords: topological index, Balaban index, sum-Balaban index, Randić index
Published in RUP: 03.01.2022; Views: 974; Downloads: 21
.pdf Full text (310,27 KB)

2.
On a conjecture about the ratio of Wiener index in iterated line graphs
Katarína Hriňáková, Martin Knor, Riste Škrekovski, 2018, original scientific article

Keywords: Wiener index, line graph, tree, iterated line graph
Published in RUP: 03.01.2022; Views: 1154; Downloads: 27
.pdf Full text (391,35 KB)

3.
Mathematical aspects of Wiener index
Martin Knor, Riste Škrekovski, Aleksandra Tepeh, 2016, original scientific article

Abstract: The Wiener index (i.e., the total distance or the transmission number), defined as the sum of distances between all unordered pairs of vertices in a graph, is one of the most popular molecular descriptors. In this article we summarize some results, conjectures and problems on this molecular descriptor, with emphasis on works we were involved in.
Keywords: Wiener index, total distance, topological index, molecular descriptor, chemical graph theory
Published in RUP: 03.01.2022; Views: 1111; Downloads: 33
.pdf Full text (434,58 KB)

4.
On 12-regular nut graphs
Nino Bašić, Martin Knor, Riste Škrekovski, 2021, original scientific article

Keywords: nut graph, adjacency matrix, singular matrix, core graph, Fowler construction, regular graph
Published in RUP: 16.07.2021; Views: 1095; Downloads: 25
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