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  Abstract

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by Ketan Mulmuley, Pradyut Shah
http://people.cs.uchicago.edu/~pradyut/papers/blocking.pdf
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Abstract:

We show that the Maximum Blocking Flow problem on a graph of n vertices cannot be computed in time o(n 1/8) with polynomially many processors on an unbounded fan-in PRAM without bit operations, even when the bitlengths of the inputs are restricted to be of size O(n 2). 1

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