Efficient algorithms for minimal disjoint path problems on chordal graphs

C.P. Gopalakrishnan; C.R. Satyan; C. Pandu Rangan

Discussiones Mathematicae Graph Theory (1995)

  • Volume: 15, Issue: 2, page 119-145
  • ISSN: 2083-5892

Abstract

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Disjoint paths have applications in establishing bottleneck-free communication between processors in a network. The problem of finding minimum delay disjoint paths in a network directly reduces to the problem of finding the minimal disjoint paths in the graph which models the network. Previous results for this problem on chordal graphs were an O(|V| |E|²) algorithm for 2 edge disjoint paths and an O(|V| |E|) algorithm for 2 vertex disjoint paths. In this paper, we give an O(|V| |E|) algorithm for 2 vertex disjoint paths and an O(|V|+|E|) algorithm for 2 edge disjoint paths, which is a significant improvement over the previous result.

How to cite

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C.P. Gopalakrishnan, C.R. Satyan, and C. Pandu Rangan. "Efficient algorithms for minimal disjoint path problems on chordal graphs." Discussiones Mathematicae Graph Theory 15.2 (1995): 119-145. <http://eudml.org/doc/270438>.

@article{C1995,
abstract = {Disjoint paths have applications in establishing bottleneck-free communication between processors in a network. The problem of finding minimum delay disjoint paths in a network directly reduces to the problem of finding the minimal disjoint paths in the graph which models the network. Previous results for this problem on chordal graphs were an O(|V| |E|²) algorithm for 2 edge disjoint paths and an O(|V| |E|) algorithm for 2 vertex disjoint paths. In this paper, we give an O(|V| |E|) algorithm for 2 vertex disjoint paths and an O(|V|+|E|) algorithm for 2 edge disjoint paths, which is a significant improvement over the previous result.},
author = {C.P. Gopalakrishnan, C.R. Satyan, C. Pandu Rangan},
journal = {Discussiones Mathematicae Graph Theory},
keywords = {chordal graph; minimal paths; disjoint paths; clique; bfs; network; chordal graphs; algorithm},
language = {eng},
number = {2},
pages = {119-145},
title = {Efficient algorithms for minimal disjoint path problems on chordal graphs},
url = {http://eudml.org/doc/270438},
volume = {15},
year = {1995},
}

TY - JOUR
AU - C.P. Gopalakrishnan
AU - C.R. Satyan
AU - C. Pandu Rangan
TI - Efficient algorithms for minimal disjoint path problems on chordal graphs
JO - Discussiones Mathematicae Graph Theory
PY - 1995
VL - 15
IS - 2
SP - 119
EP - 145
AB - Disjoint paths have applications in establishing bottleneck-free communication between processors in a network. The problem of finding minimum delay disjoint paths in a network directly reduces to the problem of finding the minimal disjoint paths in the graph which models the network. Previous results for this problem on chordal graphs were an O(|V| |E|²) algorithm for 2 edge disjoint paths and an O(|V| |E|) algorithm for 2 vertex disjoint paths. In this paper, we give an O(|V| |E|) algorithm for 2 vertex disjoint paths and an O(|V|+|E|) algorithm for 2 edge disjoint paths, which is a significant improvement over the previous result.
LA - eng
KW - chordal graph; minimal paths; disjoint paths; clique; bfs; network; chordal graphs; algorithm
UR - http://eudml.org/doc/270438
ER -

References

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  2. [K 75] R.M. Karp, On the computational complexity of combinatorial problems, Networks 5 (1975) 45-68. Zbl0324.05003
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  4. [PS 78] Y. Perl, Y. Shiloach, Finding two disjoint paths between two pairs of vertices in a graph, J. of the ACM 25 (1978) 1-9, doi: 10.1145/322047.322048. Zbl0365.68026
  5. [RS 86] N. Robertson, P.D. Seymour, Graph minors XIII. The disjoint paths problem, Manuscript 1986. 
  6. [S 80] Y. Shiloach, A polynomial solution to the undirected two paths problem, J. of the ACM 27 (1980) 445-456, doi: 10.1145/322203.322207. Zbl0475.68042
  7. [S 89] A. Schwill, Shortest edge-disjoint paths in graphs, in: Proc. of the 6th STACS (1989) 505-516. 
  8. [S 90] A. Schwill, Nonblocking graphs: Greedy algorithms to compute disjoint paths, in: Proc. of the 7th STACS (1990) 250-262. 
  9. [KPS 91] S.V. Krishnan, C. Pandu Rangan, S. Seshadri, A. Schwill, Two Disjoint Paths in Chordal graphs, Technical report, 2/91, February 1991, University of Oldenburg, Germany. 

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