\documentclass{article}
\usepackage{amsmath}
\title{Complete Statistical Mechanics: Fluctuation-Response Relation}
\begin{document}
\maketitle

\section{Fluctuation-Response Relation}

Macroscopic response functions are encoded in fluctuations. Heat capacity,
compressibility, and susceptibility measure how equilibrium changes when a
control variable is varied.

\end{document}
