Document Type
Technical Report
Publication Date
11-1993
Technical Report Number
PCS-TR93-200
Abstract
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 $o(n)$.
Dartmouth Digital Commons Citation
Djidjev, Hristo N.; Pantziou, Grammati E.; and Zaroliagis, Christos D., "On-Line and Dynamic Shortest Paths Through Graph Decompositions" (1993). Computer Science Technical Report PCS-TR93-200. https://digitalcommons.dartmouth.edu/cs_tr/71