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Information Processing Letters
Volume 83, Issue 1, 16 July 2002, Pages 21-26
 
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doi:10.1016/S0020-0190(01)00307-6    How to Cite or Link Using DOI (Opens New Window)
Copyright © 2001 Elsevier Science B.V. All rights reserved.

A time-optimal distributed sorting algorithm on a line network

Atsushi SasakiE-mail The Corresponding Author

NTT Communication Science Laboratories, NTT Corporation, Kyoto, Japan

Received 28 February 2001; 
revised 11 October 2001. 
Communicated by K. Iwama 
Available online 31 October 2001.

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Abstract

We have achieved a strict lower time bound of n−1 for distributed sorting on a line network, where n is the number of processes. The lower time bound has traditionally been considered to be n because it is proved based on the number of disjoint comparison-exchange operations in parallel sorting on a linear array. Our result has overthrown the traditional common belief.

Author Keywords: Distributed sorting; Algorithms; Computational complexity; Distributed computing; Line network


 
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