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oai:docta.ucm.es:20.500.14352/571612023-08-27T02:22:22Zcom_20.500.14352_14col_20.500.14352_15

Bradley Delso, Margarita 2023-06-20T16:49:47Z 2023-06-20T16:49:47Z 1989 0764-4442 https://hdl.handle.net/20.500.14352/57161 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] eng restricted access Convex-Hull Of Polynomials And Sums Of 2m-Th Powers journal article