An optimal randomized logarithmic time connectivity algorithm for the EREW PRAM (extended abstract)

  • Authors:
  • Shay Halperin;Uri Zwick

  • Affiliations:
  • Department of Computer Science, Tel Aviv University, Tel Aviv, 69978, Israel;Department of Computer Science, Tel Aviv University, Tel Aviv, 69978, Israel

  • Venue:
  • SPAA '94 Proceedings of the sixth annual ACM symposium on Parallel algorithms and architectures
  • Year:
  • 1994

Quantified Score

Hi-index 0.00

Visualization

Abstract

Improving a long chain of works we obtain a randomized EREW PRAM algorithm for finding the connected components of a graph G=(V,E) with n vertices and m edges in O(log n) time using an optimal number of O((m+n)/log n) processors. The result returned by the algorithm is always correct. The probability that the algorithm will not complete in O(log n) time is at most n-c for any desired c 0.The best deterministic EREW PRAM connectivity algorithm, obtained by Chong and Lam, runs in O(log n log log n) time using m + n processors.