Mathematical theorem finds gerrymandering in PA congressional district maps
(PHYSorg.com Mathematics)

Pennsylvania`s congressional district maps are almost certainly the result of gerrymandering according to an analysis based on a new mathematical theorem on bias in Markov Chains developed by Carnegie Mellon University and University of Pittsburgh mathematicians. Their findings are published in the Feb. 28 online early edition of the Proceedings of the National Academy of Sciences (PNAS).