NP is as easy as detecting unique solutions
STOC '85 Proceedings of the seventeenth annual ACM symposium on Theory of computing
The Complexity of Near-Optimal Graph Coloring
Journal of the ACM (JACM)
A Probabilistic Algorithm for k-SAT and Constraint Satisfaction Problems
FOCS '99 Proceedings of the 40th Annual Symposium on Foundations of Computer Science
An improved exponential-time algorithm for k-SAT
Journal of the ACM (JACM)
On the solution-space geometry of random constraint satisfaction problems
Proceedings of the thirty-eighth annual ACM symposium on Theory of computing
A Duality between Clause Width and Clause Density for SAT
CCC '06 Proceedings of the 21st Annual IEEE Conference on Computational Complexity
WINE '08 Proceedings of the 4th International Workshop on Internet and Network Economics
IEEE/ACM Transactions on Networking (TON)
Social and Economic Networks
Pushing random walk beyond golden ratio
CSR'07 Proceedings of the Second international conference on Computer Science: theory and applications
Experiments in social computation
Communications of the ACM
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A growing literature on human networks suggests that the way we are connected influences both individual and group outcomes. Recent experimental studies in the social and computer sciences have claimed that higher network connectivity helps individuals solve coordination problems. However, this is not always the case, especially when we consider complex coordination tasks; we demonstrate that networks can have both constraining edges that inhibit collective action and redundant edges that encourage it. We show that the constraints imposed by additional edges can impede coordination even though these edges also increase communication. By contrast, edges that do not impose additional constraints facilitate coordination, as described in previous work. We explain why the negative effect of constraint trumps the positive effect of communication by analyzing coordination games as a special case of widely-studied constraint satisfaction problems. The results help us to understand the importance of problem complexity and network connections, and how different types of connections can influence real-world coordination.