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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/1498

Title: Improved decremental algorithms for maintaining transitive closure and all-pairs shortest paths
Authors: Baswana, Surender
Hariharan, Ramesh
Sen, Sandeep
Keywords: BFS tree
Transitive closure
Shortest paths
Issue Date: 2004
Citation: Journal of Algorithms, In Press, Corrected Proof
Abstract: This paper presents improved algorithms for the following problem: given an unweighted directed graph G(V,E) and a sequence of on-line shortest-path/reachability queries interspersed with edge-deletions, develop a data-structure that can answer each query in optimal time, and can be updated efficiently after each edge-deletion. The central idea underlying our algorithms is a scheme for implicitly storing all-pairs reachability/shortest-path information, and an efficient way to maintain this information. Our algorithms are randomized and have one-sided inverse polynomial error for query.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/1498
Appears in Collections:Computer Science and Engineering

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