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Positive Polynomials: From Hilbert's 17th Problem to Real Algebra/en-ca/positive-polynomials-from-hilberts-17th-problem-to-real-algebra/40723D78-0E57-4847-AFA5-DDBF75CF60B8.html40723D78-0E57-4847-AFA5-DDBF75CF60B8
Positive Polynomials: From Hilbert's 17th Problem to Real Algebra