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Vira Hari Krisnawati

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Open access Sep 2026

On the Minimum Coprime Number of Some Graphs

Let G be a finite simple graph. A coprime labeling of G is an injective assignment of positive integers to the vertices such that adjacent vertices receive relatively prime labels. The minimum coprime number of G, denoted by pr(G), is the smallest integer k for which G admits a coprime labeling using labels from {1, 2,...

Hafif Komarullah, K. Wijaya, Noor Hidayat et al. · 0 citations
Open access Sep 2026

A Remark on the Energy Bounds and Degree-Based Topological Indices of the Zero-Divisor Graph ℤₚ[x]/⟨x⁴⟩

The zero-divisor graph of a commutative ring, Γ(R), is a prominent subject in graph theory. Previous research has investigated the energy and topological indices of Γ(ℤₚ[x]/⟨x⁴⟩) for any prime p; however, errors were identified in the characteristic polynomial and the associated energy bounds. Recent work by Rather add...

Vira Hari Krisnawati, Ayunda Faizatul Musyarrofah, Ari Andari · 0 citations

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