Optimal estimation of functionals of high-dimensional mean and covariance matrix
高维均值与协方差矩阵泛函的最优估计AI 解读 ↓
本页整理公开书目信息,不生成学术质量评分。AI 解读根据题名及所注明的摘要或原文片段生成,未完成全文核验,可能有误;具体假设、证明与结论请核对原文。摘要保留来源文本,未经模型改写。
DOI 首次登记不等于接收或发表日期。部分更正、评论等条目没有独立摘要;缺少可靠材料时保留待补状态。
本页为预印本版本;arXiv 收录、作者填写的期刊信息以及作者既有发表经历,都不单独证明本篇已接收。作者发表记录按 OpenAlex 身份与完整姓名、本站覆盖期刊 ISSN 及正式卷期核对,只展示已核实例,档案仍可能误合并。
引用量采用 OpenAlex 单条关联记录,不合计多个记录;关联记录可能包含正式发表版本,不等于此版本单独引用。缺失不视为零,引用指标不代表论文质量。
关注作者按书目中的完整姓名匹配,同名和姓名变体需人工辨别。相关论文先按共享细分方向和具体方法排列,再参考通用方法与发表日期。
AI 根据所提供的论文材料归类:摘要以投资组合配置和判别分析为动机,但核心是通用高维泛函估计,未直接研究所列金融细分问题。
高维均值与协方差矩阵泛函的最优估计AI 解读 ↓
正在核对关联版本…
正在核对对应版本的资源…
Motivated by portfolio allocation and linear discriminant analysis, we consider estimating a functional $\mathbfμ^T \mathbfΣ^{-1} \mathbfμ$ involving both the mean vector $\mathbfμ$ and covariance matrix $\mathbfΣ$. We study the minimax estimation of the functional in the high-dimensional setting where $\mathbfΣ^{-1} \mathbfμ$ is sparse. Akin to past works on functional estimation, we show that the optimal rate for estimating the functional undergoes a phase transition between regular parametric rate and some form of high-dimensional estimation rate. We further show that the optimal rate is attained by a carefully designed plug-in estimator based on de-biasing, while a family of naive plug-in estimators are proved to fall short. We further generalize the estimation problem and techniques that allow robust inputs of mean and covariance matrix estimators. Extensive numerical experiments lend further supports to our theoretical results.