Article ID Journal Published Year Pages File Type
4648287 Discrete Mathematics 2012 6 Pages PDF
Abstract

We answer the following question: what is the minimum number of edges of a 2-connected graph with a given diameter? This problem stems from survivable telecommunication network design with grade-of-service constraints. In this paper, we prove tight bounds for 2-connected graphs and for 2-edge-connected graphs. The bound for 2-connected graphs was a conjecture of B. Bollobás (AMH 75–80) [3].

► We introduce the notion of peri-eccentricity which relates the trail decomposition of lobes to the diameter a graph. ► We give a tight minimum bound for the number of edges of a 2-connected graph with given diameter. ► We prove a tight minimum bound for the number of edges of a 2-edge-connected graph with given diameter.

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Related Topics
Physical Sciences and Engineering Mathematics Discrete Mathematics and Combinatorics
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