Abstract

Suppose that n processors are arranged in a ring and can communicate only with their immediate neighbors. It is shown that any probabilistic algorithm for 3 coloring the ring must take at least $\frac{1}{2}\log^* n - 2$ rounds, otherwise the probability that all processors are colored legally is less than $\frac{1}{2}$. A similar time bound holds for selecting a maximal independent set. The bound is tight (up to a constant factor) in light of the deterministic algorithms of Cole and Vishkin [Inform, and Control, 70 (1986), pp. 32–53] and extends the lower bound for deterministic algorithms of Linial [Proc. 28th IEEE Foundations of Computer Science Symposium, 1987, pp. 331–335].

MSC codes

  1. 68M10
  2. 68Q20
  3. 68R05
  4. 68R10

Keywords

  1. distributed computation
  2. probabilistic algorithms
  3. graph coloring

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References

BNN.
Amotz Bar-Noy, Joseph Naor, Moni Naor, One-bit algorithms, Distrib. Comput., 4 (1990), 3–8
CV.
Richard Cole, Uzi Vishkin, Deterministic coin tossing with applications to optimal parallel list ranking, Inform. and Control, 70 (1986), 32–53
GPS.
A. Goldberg, S. Plotkin, G. Shannon, Efficient parallel algorithms for (Δ+1)-coloring and maximal independent set problems, Proc. 19th ACM Symp. on Theory of Computing, 1987, 315–324
L.
N. Linial, Distributive graphs algorithms—global solutions from local data, Proc. 28th IEEE Foundations of Computer Science Symposium, 1987, 331–335

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Published In

cover image SIAM Journal on Discrete Mathematics
SIAM Journal on Discrete Mathematics
Pages: 409 - 412
ISSN (online): 1095-7146

History

Submitted: 20 June 1990
Accepted: 4 September 1990
Published online: 8 August 2006

MSC codes

  1. 68M10
  2. 68Q20
  3. 68R05
  4. 68R10

Keywords

  1. distributed computation
  2. probabilistic algorithms
  3. graph coloring

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