B. Hanin

Nonlinear Approximation and (Deep) ReLU\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mathrm {ReLU}$$\end{document} pdf

G. Petrova, I. Daubechies, R. DeVore, 2019, Constructive Approximation.

Nonlinear Approximation and (Deep) $$\mathrm {ReLU}$$ ReLU Networks

G. Petrova, R. DeVore, I. Daubechies, 2021, Constructive Approximation.