\documentclass[11pt]{article} \usepackage{amsmath, amssymb, amsthm} \date{} \title{Supplementary Material \\ {\small Inferring Graphs from Cascades: A Sparse Recovery Framework}} \begin{document} \maketitle \subsection*{Approximate Sparsity} \subsection*{(RE) with high probability} \subsection*{Lower Bound} \end{document}