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Polynomials non-negative on strips and half-strips
Polynomials non-negative strips half-strips
2010/12/8
Throughout, we work in the real polynomial ring in two variables, which we denote by R[x; y]. The set of sums of squares in R[x; y] is denoted by P R[x; y]2. Recently,M. Marshall [4] settled a long-st...