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• W2946242153 abstract "Let $mathcal{F}$ be a set consisting of $n$ real vectors of dimension $m leq n$. For any saturated, i.e., $m$-element, subset $mathcal{S}$ of $mathcal{F}$, let $mathrm{vol}(mathcal{S})$ be the volume of the parallelotope formed by the vectors of $mathcal{S}$. A set $mathcal{S}^*$ is called a $D$-optimal saturated subset of $mathcal{F}$, if it maximizes $mathrm{vol}(mathcal{S})$ among all saturated subsets of $mathcal{F}$. In this paper, we propose two greedy heuristics for the construction of saturated subsets performing well with respect to the criterion of $D$-optimality: an improvement of the method suggested by Galil and Kiefer for the initiation of $D$-optimal experimental design algorithms, and a modification of the Kumar-Yildirim method, the original version of which was proposed for the initiation of the minimum-volume enclosing ellipsoid algorithms. We provide geometric and analytic insights into the two methods, and compare them to the commonly used random and regularized greedy heuristics. We also suggest variants of the greedy methods for a large set $mathcal{F}$, for the construction of $D$-efficient non-saturated subsets, and for alternative optimality criteria." @default.
• W2946242153 created "2019-05-29" @default.
• W2946242153 creator A5072657186 @default.
• W2946242153 creator A5084737189 @default.
• W2946242153 date "2019-05-18" @default.
• W2946242153 modified "2023-09-27" @default.
• W2946242153 title "On greedy heuristics for computing D-efficient saturated subsets" @default.
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