Minimizing Polynomials via Sum of Squares over the Gradient Ideal.

Jiawang Nie James Demmel Bernd Sturmfels Minimizing Polynomials via Sum of Squares over the Gradient Ideal. 587-606 2006 106 Math. Program. 3 http://dx.doi.org/10.1007/s10107-005-0672-6 db/journals/mp/mp106.html#NieDS06