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.

We give sharp upper bounds on the Zagreb indices and lower bounds on the Zagreb coindices of chemical trees and characterize the case of equality for each of these topological invariants.

we give sharp upper bounds on the zagreb indices and lower bounds on the zagreb coindices of chemical trees and characterize the case of equality for each of these topological invariants.

1Division of Zoology, Department of biology, Faculty of science, University of Zagreb, rooseveltov trg 6, 10000 Zagreb, Croatia (*[email protected]) 2Division of botany, Department of biology, Faculty of science, University of Zagreb, Marulićev trg 20/II, 10000 Zagreb, Croatia 3National Museum Zadar, Natural History Department, Medulićeva 1, 23000 Zadar, Croatia (prirodoslovni.odjel@nm...

MLADEN NIKŠIĆ, M.Sc. E-mail: [email protected] University of Zagreb, Faculty of Transport and Traffic Sciences Vukelićeva 4, HR-10000 Zagreb, Republic of Croatia SLAVEN GAŠPAROVIĆ, Ph.D. student E-mail: [email protected] University of Zagreb, Faculty of Science Department of Geography Marulićev trg 19, HR-10000 Zagreb, Republic of Croatia Transport Engineering Review Accepted: Mar. 17, 201...

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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...