Generalized polar varieties: geometry and algorithms.

Bernd Bank Marc Giusti Joos Heintz Luis Miguel Pardo Generalized polar varieties: geometry and algorithms. 377-412 2005 21 J. Complexity 4 http://dx.doi.org/10.1016/j.jco.2004.10.001 db/journals/jc/jc21.html#BankGHP05