CONVERGENCE OF THE POINCAR ´ E CONSTANT ∗
CONVERGENCE OF THE POINCAR ´ E CONSTANT ∗
复制标题
庞加莱常数的收敛性*
DOI:
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发表时间:
2004
期刊:
影响因子:
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通讯作者:
O. Johnson
中科院分区:
文献类型:
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作者:
O. Johnson
The Poincare constant RY of a random variable Y relates the L 2 (Y )-norm of a function g and its derivative g� . Since RY − D(Y ) is positive, with equality if and only if Y is normal, it can be seen as a distance from the normal distribution. In this paper we establish the best possible rate of convergence of this distance in the central limit theorem. Furthermore, we show that RY is finite for discrete mixtures of normals, allowing us to add rates to the proof of the central limit theorem in the sense of relative entropy.