Political Districting to Minimize County Splits
研究如何用整数规划方法精确计算美国各州在划分选区时最少需要分割多少个县，为选举公平提供可操作的数学工具。
Political Districting to Minimize County Splits When dividing a state into districts for elections, one traditional criterion is that political subdivisions like counties and cities should not be divided unnecessarily. Some states go as far as to say that the number of county splits should be minimized, but previously there was no scalable exact method for determining this. With new integer programming techniques, Shahmizad and Buchanan exactly compute this minimum number for all states and district types (congressional, state senate, state house) across the USA.