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arxiv 2006.14772 v1 pith:EXZUOXCX submitted 2020-06-26 math.GT math.MG

Two robots moving geodesically on a tree

classification math.GT math.MG
keywords complexityconfigurationgeodesicmetricsorderedpairspacetree
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We study the geodesic complexity of the ordered and unordered configuration spaces of graphs in both the $\ell_1$ and $\ell_2$ metrics. We determine the geodesic complexity of the ordered two-point $\varepsilon$-configuration space of any star graph in both the $\ell_1$ and $\ell_2$ metrics and of the unordered two-point configuration space of any tree in the $\ell_1$ metric, by finding explicit geodesics from any pair to any other pair, and arranging them into a minimal number of continuously-varying families. In each case the geodesic complexity matches the known value of the topological complexity.

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