Wiener Index of Armchair Polyhex Nanotubes* Page 1 Wiener Index of Armchair Polyhex
Nanotubes* Mircea V. Diudea,a,** Monica Stefu,a Basil Pârv,b and Peter E. Johnc aBabes-Bolyai …

Abstract The Padmakar–Ivan (PI) index of a graph G is defined as PI (G)=∑[neu (e| G)+ nev
(e| G)], where neu (e| G) is the number of edges of G lying closer to u than to v, nev (e| G) is …

A topological index of a graph G is a numeric quantity related to G which describes the
molecular graph G. A dendrimer is an artificially manufactured or synthesized molecule built …

Square tori are transformed into hexagonal and other tiling tori by several cutting
procedures. The toroidal objects thus generated are optimized by a molecular mechanics …

Wiener Index of Zig-zag Polyhex Nanotubes* å Page 1 Wiener Index of Zig-zag Polyhex
Nanotubes* Peter E. Johna,** and Mircea V. Diudeab aTechnical University Ilmenau, Institute …

Let G be a graph with n vertices and di is the degree of its ith vertex (di is the degree of vi). In
this article, we compute the redefined first Zagreb index, redefined second Zagreb index …

Rhomboidal toris which are Cayley graphs Page 1 Discrete Mathematics, Algorithms and
Applications Vol. 11, No. 3 (2019) 1950033 (7 pages) c© World Scientific Publishing Company …

Sažetak A map M is a combinatorial representation of a closed surface. Convex polyhedra,
starting from the Platonic solids and going to spherical fullerenes, can be operated to obtain …

Abstract The Padmakar–Ivan (PI) index of a graph G is defined as PI (G)=[neu (e| G)+ nev (e|
G)], where neu (e| G) is the number of edges of G lying closer to u than to v, nev (e| G) is the …

Among the numerous topological indices considered in chemical graph theory, only a few
have been found noteworthy in practical application, connectivity index is one of them. In this …