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 ...

‎let g=(v,e) be a simple connected graph with vertex set v and edge set e. the first, second and third zagreb indices of g are respectivly defined by: $m_1(g)=sum_{uin v} d(u)^2, hspace {.1 cm} m_2(g)=sum_{uvin e} d(u).d(v)$ and $ m_3(g)=sum_{uvin e}| d(u)-d(v)| $ , where d(u) is the degree of vertex u in g and uv is an edge of g connecting the vertices u and v. recently, the first and second m...

The second Zagreb coindex is a well-known graph invariant defined as the total degree product of all non-adjacent vertex pairs in a graph. The second Zagreb eccentricity coindex is defined analogously to the second Zagreb coindex by replacing the vertex degrees with the vertex eccentricities. In this paper, we present exact expressions or sharp lower bounds for the second Zagreb eccentricity co...

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, ...

Lea Milutinović1, Marijana Braš2,3, Veljko Đorđević3 1University of Zagreb School of Medicine, Student Society for Neuroscience, Zagreb, Croatia, 2Zagreb University Hospital Centre, Department of Psychological Medicine, Zagreb, Croatia, 3University of Zagreb School of Medicine, Centre for Palliative Medicine, Medical Ethics and Communication Skills, Zagreb, Croatia / 1Sveučilište u Zagrebu, Med...

School of Medicine, University of Zagreb, Croatia (VI, MJ); School of Medicine, University of Zagreb, Department of Nephrology, Hypertension, Dialysis and Transplantation, University Hospital Center Zagreb, Croatia (ML, AV, SK, JK, TZ, VP, MZ, BJ); School of Medicine, University of Zagreb, Department of Metabolic Disorders, University Hospital Center Zagreb, Zagreb, Croatia (IP); and School of ...

1Čakovec General Hospital, Čakovec, Croatia; 2University Hospital Centre Zagreb, Department of Nephrology, Arterial Hypertension, Dialysis and Transplantation, Zagreb, Croatia; 3Sestre milosrdnice University Hospital Centre, Department of Nuclear Medicine, Zagreb, Croatia; 4University Hospital Centre Zagreb, Department of Dermatology and Venereology, Zagreb, Croatia; 5University of Zagreb Schoo...

‎Let G=(V,E) be a simple connected graph with vertex set V and edge set E. The first, second and third Zagreb indices of G are respectivly defined by: $M_1(G)=sum_{uin V} d(u)^2, hspace {.1 cm} M_2(G)=sum_{uvin E} d(u).d(v)$ and $ M_3(G)=sum_{uvin E}| d(u)-d(v)| $ , where d(u) is the degree of vertex u in G and uv is an edge of G connecting the vertices u and v. Recently, the first and second m...