Fast deterministic distributed algorithms for sparse spanners

  • Authors:
  • Bilel Derbel;Cyril Gavoille

  • Affiliations:
  • LaBRI, Université Bordeaux 1, Talence, France;LaBRI, Université Bordeaux 1, Talence, France

  • Venue:
  • SIROCCO'06 Proceedings of the 13th international conference on Structural Information and Communication Complexity
  • Year:
  • 2006

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Abstract

This paper concerns the efficient construction of sparse and low stretch spanners for unweighted arbitrary graphs with n nodes. All previous deterministic distributed algorithms, for constant stretch spanner of o(n2) edges, have a running time Ω(nε) for some constant ε 0 depending on the stretch. Our deterministic distributed algorithms construct constant stretch spanners of o(n2) edges in o(nε) time for any constant ε 0 More precisely, in the Linial's free model, we construct in $n^{O(1/\sqrt{\log n})}$ time, for every graph, a 5-spanner of O(n3/2) edges. The result is extended to O( k2.322)-spanners with O(n1+1/k) edges for every parameter k ≥1. If the minimum degree of the graph is $\Omega(\sqrt{n})$, then, in the same time complexity, a 9-spanner with O(n) edges can be constructed