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DMGT
2011

Closed k-stop distance in graphs

13 years 3 months ago
Closed k-stop distance in graphs
The Traveling Salesman Problem (TSP) is still one of the most researched topics in computational mathematics, and we introduce a variant of it, namely the study of the closed k-walks in graphs. We search for a shortest closed route visiting k cities in a non complete graph without weights. This motivates the following definition. Given a set of k distinct vertices S = {x1, x2, . . . , xk} in a simple graph G, the closed k-stop-distance of set S is defined to be dk(S) = min θ∈P(S) d(θ(x1), θ(x2))+d(θ(x2), θ(x3))+· · ·+d(θ(xk), θ(x1)) , where P(S) is the set of all permutations from S onto S. That is the same as saying that dk(S) is the length of the shortest closed walk through the vertices {x1, . . . , xk}. Recall that the Steiner distance sd(S) is the number of edges in a minimum connected subgraph containing all of the vertices of S. We note some relationships between Steiner distance and closed k-stop distance.
Grady Bullington, Linda Eroh, Ralucca Gera, Steven
Added 27 Aug 2011
Updated 27 Aug 2011
Type Journal
Year 2011
Where DMGT
Authors Grady Bullington, Linda Eroh, Ralucca Gera, Steven J. Winters
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