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Electronic Colloquium on Computational Complexity

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TR15-137 | 22nd August 2015
Mohammad Bavarian, Dmytro Gavinsky, Tsuyoshi Ito

On the Role of Shared Randomness in Simultaneous Communication

Two parties wish to carry out certain distributed computational tasks, and they are given access to a source of correlated random bits.
It allows the parties to act in a correlated manner, which can be quite useful.
But what happens if the shared randomness is not perfect?

In this work, ... more >>>


TR15-136 | 28th July 2015
Takayuki Sakai, Kazuhisa Seto, Suguru Tamaki, Junichi Teruyama

A Satisfiability Algorithm for Depth-2 Circuits with a Symmetric Gate at the Top and AND Gates at the Bottom

In this paper, we present a moderately exponential time algorithm for the circuit satisfiability problem of
depth-2 unbounded-fan-in circuits with an arbitrary symmetric gate at the top and AND gates at the bottom.
As a special case, we obtain an algorithm for the maximum satisfiability problem that runs in ... more >>>


TR15-135 | 19th August 2015
Arnab Bhattacharyya, Palash Dey

Fishing out Winners from Vote Streams

Revisions: 1

We investigate the problem of winner determination from computational social choice theory in the data stream model. Specifically, we consider the task of summarizing an arbitrarily ordered stream of $n$ votes on $m$ candidates into a small space data structure so as to be able to obtain the winner determined ... more >>>



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