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Moreau Identity

1.不带参数: p r o x f ( x )

MATH97136

Statistical Methods for Big Data (MATH97136)Coursework AssignmentIntroductionThis is the coursework assignment associated with the Big Data in Statistics module, M5MS15. Thehand-out date for these instructions is 25th February 2020. A report response is t

Proximal Algorithms 3 Interpretation

目录 Moreau-Yosida regularization 与次梯度的联系 \(\mathbf{prox}_{\lambda f} = (I + \lambda \partial f)^{-1}\) 改进的梯度路径 信赖域问题 Proximal Algorithms 这一节,作者总结了一些关于proximal的一些直观解释 Moreau-Yosida regularization 内部卷积(infimal co

Proximal Algorithms 1 介绍

目录 定义 解释 图形解释 梯度解释 一个简单的例子 Proximal Algorithms 定义 令\(f: \mathrm{R}^n \rightarrow \mathrm{R} \cup \{+ \infty \}\)为闭的凸函数,即其上镜图: \[ \mathbf{epi} f = \{ (x, t) \in \mathrm{R}^n \times \mathrm{R}| f(x) \le t\} \] 为非空闭