B. Podobnik, 2, 3, 4 T. Lipic, D. Horvatic, A. Majdandzic, S. Bishop, and H. E. Stanley Faculty of Civil Engineering, University of Rijeka, 51000 Rijeka, Croatia Department of Physics, Boston University, Boston, MA 02215, USA Zagreb School of Economics and Management, 10000 Zagreb, Croatia Faculty of Economics, University of Ljubljana, 1000 Ljubljana, Slovenia Rudjer Boskovic Institute, 10000 Z...

For a nontrivial graph G, its first Zagreb coindex is defined as the sum of degree sum over all non-adjacent vertex pairs in G and the second Zagreb coindex is defined as the sum of degree product over all non-adjacent vertex pairs in G. Till now, established results concerning Zagreb coindices are mainly related to composite graphs and extremal values of some special graphs. The existing liter...

—The graphs which are used in this paper simple, finite and undirected. The first second Zagreb indices for every non-adjacent vertices (also called coindices) dependent only on the degrees interspersed operations of addition multiplication, respectively, vertices. number edges incident vertex v a graph G is degree two u if it’s no common edge between them. In paper, we found coindices chains e...

+ Groenemeyer Institute for Microtherapy, 44799 Bochum, Germany, Department of General Surgery and Traumatology, General Hospital Varazdin, I Mestrovica bb, 42000, Varazdin, Croatia, Croatian Institute of Transfusion Medicine, Petrova ulica, 10000, Zagreb, Croatia, Department of Orthopaedic Surgery, School of Medicine, University of Zagreb, Salata 3b, 10000, Zagreb, Croatia, The Scientific Unit...

Let $A(G)$ be the adjacency matrix and $D(G)$ diagonal of vertex degrees a simple connected graph $G$. Nikiforov defined $A_{\alpha}(G)$ convex combinations as $A_{\alpha}(G)=\alpha D(G)+(1-\alpha)A(G)$, for $0\leq \alpha\leq 1$. If $ \rho_{1}\geq \rho_{2}\geq \dots \geq \rho_{n}$ are eigenvalues (which we call $\alpha$-adjacency $G$), \alpha $-adjacency energy $G$ is $E^{A_{\alpha}}(G)=\sum_{i...

Adresa za dopisivanje Boris Klaić, Stomatološka poliklinika Perkovčeva 3, HR-10 000 Zagreb [email protected] Sažetak Svrha rada bila je dobiti trodimenzionalne kvalitativne i kvantitativne podatke o topografiji elektropoliranih uzoraka Co-Cr dentalne legure na nano-ljestvici, točnije podatke o dvjema različitim čvrstim fazama opisanima u literaturi kao dendriti i interdendritski prostori. Materijal...

1 Karmela Aleksic-Maslac, University of Zagreb, Faculty of Electrical Engineering and Computing, Unska 3, Zagreb, Croatia, [email protected] 2 Branko Jeren, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, Croatia, [email protected] 3 Zvonko Kostanjcar (Student), University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, Croatia, Zvonko.K...

Let G be a simple connected graph. The first and second Zagreb indices have been introduced as  vV(G) (v)2 M1(G) degG and M2(G)  uvE(G)degG(u)degG(v) , respectively, where degG v(degG u) is the degree of vertex v (u) . In this paper, we define a new distance-based named HyperZagreb as e uv E(G) . (v))2 HM(G)     (degG(u)  degG In this paper, the HyperZagreb index of the Cartesian p...

thin films of binary bi 0 -teo and bi 0 -v 0 systems were prepared by the thermal co-evaporation technique in a vacuum at room temperature. the optical absorption edge of these systems are studied in the wavelength of 200-800 nm using a perkin-elmer uv/vis spectrophotometer. it is found that the value of n=3/2 in the davis-mott equation is best fitted for the fundamental absorption edge for the...