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On-line and dynamic algorithms for shortest path problems

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons44333

Djidjev,  Hristo
Algorithms and Complexity, MPI for Informatics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons45787

Zaroliagis,  Christos
Algorithms and Complexity, MPI for Informatics, Max Planck Society;

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MPI-I-94-114.pdf
(beliebiger Volltext), 129KB

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Zitation

Djidjev, H., Pantziou, G. E., & Zaroliagis, C.(1994). On-line and dynamic algorithms for shortest path problems (MPI-I-94-114). Saarbrücken: Max-Planck-Institut für Informatik.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0014-B514-E
Zusammenfassung
We describe algorithms for finding shortest paths and distances in a planar digraph which exploit the particular topology of the input graph. An important feature of our algorithms is that they can work in a dynamic environment, where the cost of any edge can be changed or the edge can be deleted. For outerplanar digraphs, for instance, the data structures can be updated after any such change in only $O(\log n)$ time, where $n$ is the number of vertices of the digraph. We also describe the first parallel algorithms for solving the dynamic version of the shortest path problem. Our results can be extended to hold for digraphs of genus $o(n)$.