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- W1589048315 abstract "<!-- *** Custom HTML *** --> This paper provides an extension of earlier results on minimax estimation of a high-dimensional sparse vector to even more sparse vectors. Specifically, an approximation of the minimax <i>ℓ</i><sub><i>q</i></sub> risk is obtained and threshold estimators are proved to achieve the minimax risk within an infinitesimal fraction in all small <i>ℓ</i><sub><i>p</i></sub> balls." @default.
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- W1589048315 date "2012-01-01" @default.
- W1589048315 modified "2023-10-05" @default.
- W1589048315 title "Minimax ℓ q risk in ℓ p balls" @default.
- W1589048315 doi "https://doi.org/10.1214/11-imscoll806" @default.
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