TY  - JOUR
AU  - Bradley Delso, Margarita
PY  - 1989
SN  - 0764-4442
UR  - https://hdl.handle.net/20.500.14352/57161
T2  - Comptes Rendus de l'Académie des Sciences. Série I. Mathématique
AB  - Using some elementary theory of convex sets we prove a necessary and a sufficient condition for f ε R[x„ . . ., x„](R being the real numbers) to be a finite sum of 2m-th powers of rational functions in x1, . . ., x n over R[i.e.f ε ∑ R(x)2 m]
LA  - eng
M2  - 751
PB  - Elsevier
KW  - rench polynomial ring
KW  - function field
KW  - convex set
KW  - positive semidefinite polynomial
KW  - sum of 2m-th powers
KW  - convex hull
KW  - supporting hyperplane
TI  - Convex-Hull Of Polynomials And Sums Of 2m-Th Powers
TY  - journal article
VL  - 309
ER  -