\documentclass[12pt]{article} \usepackage{amssymb,amsmath,amscd,concmath,amsfonts} \pagestyle{empty} \begin{document} \begin{equation*}\operatorname{Ad}_{g_{o c_i}^{-1}}^T:{\mathbb R}^p \to {\mathbb R}^p\end{equation*} \end{document}