Copositive Polynomial and Spline Approxi
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Y.K. Hu; D. Leviatan; X.M. Yu
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Article
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1995
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Elsevier Science
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English
β 439 KB
We prove that if a function \(f \in \mathbb{C}[0,1]\) changes sign finitely many times, then for any \(n\) large enough the degree of copositive approximation to \(f\) by quadratic spliners with \(n-1\) equally spaced knots can be estimated by \(C \omega_{2}(f, 1 / n)\), where \(C\) is an absolute c