Group and individual solutions are considered for hard problems such as satisfiability problem. Time-space trade-off in a structured active memory provides means to achieve lower time complexity for solutions of these problems.
@article{arxiv.cs/0410037,
title = {Hardware-Oriented Group Solutions for Hard Problems},
author = {Mark Burgin},
journal= {arXiv preprint arXiv:cs/0410037},
year = {2007}
}