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On cubic polyhedral graphs with prescribed adjacency properties of their faces

✍ Scribed by Peter Smutný; Michal Tkáč


Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
433 KB
Volume
191
Category
Article
ISSN
0012-365X

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✦ Synopsis


We consider classes of cubic polyhedral graphs whose non-q-gonal faces are adjacent to qgonal faces only. Structural properties of some classes of such graphs are described. For q 5 we show that all the graphs in this class are cyclically 4-edge-connected. Some cyclically 4edge-connected and cyclically 5-edge-connected non-Hamiltonian members from this class are presented.


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On the average Steiner distance of graph
✍ Peter Dankelmann; Henda C. Swart; Ortrud R. Oellermann 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 703 KB

The average n-distance of a connected graph G, p,,(G), is the average of the Steiner distances of all n-sets of vertices of G. In this paper, we give bounds on pn for two-connected graphs and for k-chromatic graphs. Moreover, we show that pn(G) does not depend on the n-diameter of G.