An asymptotically tight bound on the number of connected components of realizable sign conditions

Saugata Basu Richard Pollack Marie-Françoise Roy An asymptotically tight bound on the number of connected components of realizable sign conditions http://arxiv.org/abs/math/0603256 2006 CoRR abs/math/0603256 db/journals/corr/corr0603.html#abs-math-0603256 informal publication