Total Positivity and Convexity Preservat
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Michael S. Floater
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Article
📅
1999
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Elsevier Science
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English
⚖ 196 KB
In this paper we define convexity and rational convexity preservation of systems of functions and we show that total positivity and rational convexity preservation are equivalent. We also characterize certain convexity preserving systems in terms of weak Tchebycheff systems. Curve intersections and