A new bound for Pólya's Theorem with applications to polynomials positive on polyhedra | 10.1016/s0022-4049(00)00155-9

Victoria Powers; Bruce Reznick. (2001). A new bound for Pólya's Theorem with applications to polynomials positive on polyhedra. Journal of Pure and Applied Algebra, 164(1-2), 221–229. doi:10.1016/s0022-4049(00)00155-9

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