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A Benes-like theorem for the shuffle-exchange graph

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1 Author(s)
Schwabe, E.J. ; Dept. of Electr. Eng. & Comput. Sci., Northwestern Univ., Evanston, IL, USA

One of the first theorems on permutation routing, proved by V.E. Benes (1965), shows that give a set of source-destination pairs in an N-node butterfly network with at most a constant number of sources or destinations in each column of the butterfly, there exists a set of paths of lengths O(log N) connecting each pair such that the total congestion is constant. An analogous theorem yielding constant-congestion paths for off-line routing in the shuffle-exchange graph is proved here. The necklaces of the shuffle-exchange graph play the same structural role as the columns of the butterfly in the Benes theorem

Published in:

Computers, IEEE Transactions on  (Volume:41 ,  Issue: 12 )

Date of Publication:

Dec 1992

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