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STOC
1991
ACM

Rounds in Communication Complexity Revisited

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Rounds in Communication Complexity Revisited
The k-round two-party communication complexity was studied in the deterministic model by [14] and [4] and in the probabilistic model by [20] and [6]. We present new lower bounds that give (1) randomization is more powerful than determinism in k-round protocols, and (2) an explicit function which exhibits an exponential gap between its k and (k − 1)-round randomized complexity. We also study the three party communication model, and exhibit an exponential gap in 3-round protocols that differ in the starting player. Finally, we show new connections of these questions to circuit complexity, that motivate further work in this direction.
Noam Nisan, Avi Wigderson
Added 27 Aug 2010
Updated 27 Aug 2010
Type Conference
Year 1991
Where STOC
Authors Noam Nisan, Avi Wigderson
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