Sharon Hutton, Erich Kaltofen, Lihong Zhi. Computing the radius of positive semidefiniteness of a multivariate real polynomial via a dual of Seidenberg s method. In Wolfram Koepf, editor, Symbolic and Algebraic Computation, International Symposium, ISSAC 2010, Munich, Germany, July 25-28, 2010, Proceedings. pages 227-234, ACM, 2010. [doi]
Abstract is missing.