Vida Demarin, MD, PhD, Prof., University Department of Neurology, Sestre milosrdnice University Hospital, Referral Center for Neurovascular Disorders of the Ministry of Health and Social Welfare of the Republic Croatia, Zagreb Arijana Lovrenčić-Huzjan, MD, PhD, Prof., University Department of Neurology, Sestre milosrdnice University Hospital, Referral Center for Neurovascular Disorders of the M...

Let $G$ be a finite group. The intersection graph of is whose vertex set the all proper non-trivial subgroups and two distinct vertices $H$ $K$ are adjacent if only $H\cap K \neq \{e\}$, where $e$ identity group $G$. In this paper, we investigate some properties exploring topological indices such as Wiener, Hyper-Wiener, first second Zagreb, Schultz, Gutman eccentric connectivity $D_{2n}$ for $...

1 Department of Dental anthropology, School of Dental medicine, university of Zagreb, Zagreb, croatia; 2 Department of Dental medicine, university hospital centre Zagreb, Zagreb, croatia; 3 School of medicine, university of Split, Split, croatia; 4 Faculty of medicine, university of prishtina, prishtina, Kosova; 5 Department of conservative Dentistry and endodontics, medical university of lubli...

In this paper we give sharp upper bounds on the Zagreb indices and characterize all trees achieving equality in these bounds. Also, we give lower bound on first Zagreb coindex of trees.

todeschini et al. have recently suggested to consider multiplicative variants of additive graphinvariants, which applied to the zagreb indices would lead to the multiplicative zagrebindices of a graph g, denoted by ( ) 1  g and ( ) 2  g , under the name first and secondmultiplicative zagreb index, respectively. these are define as  ( )21 ( ) ( )v v gg g d vand ( ) ( ) ( )( )2 g d v d v gu...

Topological indices are numbers that applied to a graph and can be used describe specific properties through algebraic structures. Algebraic theory is helpful tool in range of chemistry domains. Because it helps explain how the different symmetries molecules crystals affect their structure dynamics, powerful theoretical approach for forecasting both common uncommon characteristics molecules. A ...

The Zagreb eccentricity indices are the eccentricity reformulation of the Zagreb indices. Let H be a simple graph. The first Zagreb eccentricity index (E1(H)) is defined to be the summation of squares of the eccentricity of vertices, i.e., E1(H) = ∑u∈V(H) Symmetry 2016, 9, 7; doi: 10.3390/sym9010007 www.mdpi.com/journal/symmetry Article First and Second Zagreb Eccentricity Indices of Thorny Gra...

in this paper, the hyper - zagreb index of the cartesian product, composition and corona product of graphs are computed. these corrects some errors in g. h. shirdel et al.[11].

the zagreb indices are the oldest graph invariants used in mathematical chemistry to predictthe chemical phenomena. in this paper we define the multiple versions of zagreb indicesbased on degrees of vertices in a given graph and then we compute the first and secondextremal graphs for them.

Tomislav Badel1, Kata Rošin-Grget2, Ladislav Krapac3, Miljenko Marotti4 Zavod za stomatološku protetiku Stomatološki fakultet Sveučilišta u Zagrebu 10000 Zagreb, Gundulićeva 5 Katedra za farmakologiju Stomatološki fakultet Sveučilišta u Zagrebu 10000 Zagreb, Šalata 11 Poliklinika za reumatske bolesti, fi zikalnu medicinu i rehabilitaciju “Dr. Drago Čop” 10000 Zagreb, Mihanovićeva 3 Klinički zav...