The coprime graph of a group G is Γ_G with its set vertices and any two distinct are adjacent if only their order relatively prime. Let p be prime number, then G_p denotes the multiplicative 2×2 upper unitriangular matrices over ring integers modulo p. purposes this research to study Γ_(G_p ) find first second Zagreb eccentricity indices for p≥3. results as follows. First index )isE_1 (Γ_(G_p )...

A topological index (TI) is a function that associates numeric number to the under-study molecular graph. The first TI based on distance was presented by Wiener find boiling point of paraffins. In 1972, compute total ? -electron energy molecule, degree-based indices are used. this paper, we obtained and second Zagreb con...

In this study, the explicit expressions for F-index and coindex of derived graphs such as a line graph, subdivision graph, vertex-semitotal graph, edge-semitotal graph, total graph and paraline graph (line graph of the subdivision graph) are obtained.

martindale proved that under some conditions every multiplicative isomorphism between two rings is additive. in this paper, we extend this theorem to a larger class of mappings and conclude that every multiplicative $(alpha, beta)-$derivation is additive.

The aim of this paper is using the majorization technique to identify the classes of trees with extermal (minimal or maximal) value of some topological indices, among all trees of order n ≥ 12

In this paper, we obtain some upper and lower bounds for the general extended energy of a graph. As an application, we obtain few bounds for the (edge) Zagreb energy of a graph. Also, we deduce a relation between Zagreb energy and edge-Zagreb energy of a graph $G$ with minimum degree $delta ge2$. A lower and upper bound for the spectral radius of the edge-Zagreb matrix is obtained. Finally, we ...

1Sveučilište Josipa Jurja Strossmayera u Osijeku, Medicinski fakultet Osijek, Osijek, Hrvatska 2Klinička bolnica Sveti Duh, Zagreb, Hrvatska 3Hrvatski zavod za hitnu medicinu, Zagreb, Hrvatska 4Medicinski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska 5Klinička bolnica Merkur, Zagreb, Hrvatska 1Josip Juraj Strossmayer University of Osijek, Faculty of Medicine, Osijek, Croatia 2University Hosp...

PROTON MAGNETIC RESONANCE SPECTROSCOPY IN HUNTINGTON'S DISEASE ACCOMPANYING NEUROBORRELIOSIS Helena Sarac, David Ozretic, Neven Henigsberg, Pero Hrabac, Ivan Bagaric & Lucija Bagaric-Krakan Department of Neurology, University Hospital Zagreb, Zagreb, Croatia Croatian Institute for Brain Research, Zagreb, Croatia School of Medicine, University of Zagreb, Zagreb, Croatia Department of Radiology, ...