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- W3121919993 abstract "In this paper we prove the counterintuitive result that the quadratic least squares approximation of a multivariate convex function in a finite set of points is not necessarily convex, even though it is convex for a univariate convex function. This result has many consequences both for the field of statistics and optimization. We show that convexity can be enforced in the multivariate case by using semidefinite programming techniques." @default.
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- W3121919993 date "2000-01-01" @default.
- W3121919993 modified "2023-09-23" @default.
- W3121919993 title "On Convex Quadratic Approximation" @default.
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