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An \(\varOmega (n^3)\) Lower Bound on the Number of Cell Crossings for Weighted Shortest Paths in 3-Dimensional Polyhedral Structures

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LATIN 2020: Theoretical Informatics (LATIN 2021)

Abstract

A new lower bound of \(\varOmega (n^3)\) on the maximum number of cell crossings for weighted shortest paths in 3-dimensional polyhedral structures consisting of a linear number of \(\mathcal {O}(n)\) polyhedral cells and cell faces is derived. This is a generalization and sharpening of the formerly known \(\varOmega (n^2)\) lower bound on the maximum number of cell crossings for weighted shortest path in 2-dimensional polyhedral structures and has been a long-standing open problem for the 3-dimensional case.

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Acknowledgement

The authors would like to thank the referees for valuable comments made. The third author would like to thank Erik van Leeuwen, Ioana Bercea, Karl Bringmann, and Michael Sagraloff for fruitful initial discussions which took place while that author was visiting Max-Planck Institute, Algorithms, Saarbrücken.

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Correspondence to Frank Bauernöppel .

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Bauernöppel, F., Maheshwari, A., Sack, JR. (2020). An \(\varOmega (n^3)\) Lower Bound on the Number of Cell Crossings for Weighted Shortest Paths in 3-Dimensional Polyhedral Structures. In: Kohayakawa, Y., Miyazawa, F.K. (eds) LATIN 2020: Theoretical Informatics. LATIN 2021. Lecture Notes in Computer Science(), vol 12118. Springer, Cham. https://doi.org/10.1007/978-3-030-61792-9_19

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  • DOI: https://doi.org/10.1007/978-3-030-61792-9_19

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