Adherence is better than adjacency: computing the Riemann index using CAD.

James C. Beaumont Russell J. Bradford James H. Davenport Nalina Phisanbut Adherence is better than adjacency: computing the Riemann index using CAD. 37-44 2005 conf/issac/2005 ISSAC http://doi.acm.org/10.1145/1073884.1073892 db/conf/issac/issac2005.html#BeaumontBDP05