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An Upper Bound on the Number of Extreme Shortest Paths in Arbitrary Dimensions

Authors Florian Barth , Stefan Funke, Claudius Proissl



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Author Details

Florian Barth
  • Universität Stuttgart, Germany
Stefan Funke
  • Universität Stuttgart, Germany
Claudius Proissl
  • Universität Stuttgart, Germany

Acknowledgements

We thank Kshitij Gajjar and Jaikumar Radhakrishnan for their very helpful input and for identifying an error in a previous version of this paper.

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Florian Barth, Stefan Funke, and Claudius Proissl. An Upper Bound on the Number of Extreme Shortest Paths in Arbitrary Dimensions. In 30th Annual European Symposium on Algorithms (ESA 2022). Leibniz International Proceedings in Informatics (LIPIcs), Volume 244, pp. 14:1-14:12, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2022)
https://doi.org/10.4230/LIPIcs.ESA.2022.14

Abstract

Graphs with multiple edge costs arise naturally in the route planning domain when apart from travel time other criteria like fuel consumption or positive height difference are also objectives to be minimized. In such a scenario, this paper investigates the number of extreme shortest paths between a given source-target pair s, t. We show that for a fixed but arbitrary number of cost types d ≥ 1 the number of extreme shortest paths is in n^O(log^{d-1}n) in graphs G with n nodes. This is a generalization of known upper bounds for d = 2 and d = 3.

Subject Classification

ACM Subject Classification
  • Theory of computation → Shortest paths
Keywords
  • Parametric Shortest Paths
  • Extreme Shortest Paths

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References

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