Communication-Space Tradeoffs for Unrestricted Protocols

Abstract
. This paper introduces communicating branching programs, and develops a generaltechnique for demonstrating communication-space tradeoffs for pairs of communicating branchingprograms. This technique is then used to prove communication-space tradeoffs for any pair ofcommunicating branching programs that hashes according to a universal family of hash functions.Other tradeoffs follow from this result. As an example, any pair of communicating Boolean branchingprograms that computes...

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