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The optimality of a density estimation on Besov spaces Bsr,qR for the Lp risk was established by Donoho, Johnstone, Kerkyacharian and Picard -Density estimation by wavelet thresholding,- The Annals of Statistics, Vol. 24, No. 2, 1996, pp. 508-539

To show the lower bound of optimal rates of convergence RnBsr,q, p, they use Korostelev and Assouad lemmas. However, the conditions of those two lemmas are difficult to be verified. This paper aims to give another proof for that bound by using Fano’s Lemma, which looks a little simpler. In addition, our method can be used in many other statistical models for lower bounds of estimations.


Optimal Rate of Convergence, Density Estimation, Besov Spaces, Wavelets

Cite this paper

H. Wang -Convergence Rates of Density Estimation in Besov Spaces,- Applied Mathematics, Vol. 2 No. 10, 2011, pp. 1258-1262. doi: 10.4236-am.2011.210175.

Author: Huiying Wang



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