\documentclass[../main/SI3_manual]{subfiles}

\begin{document}

% ================================================================
% Chapter 10 Ñ Single-category use
% ================================================================

\chapter{Using SI$^3$ with a single category}

\label{chap:INT}
\minitoc

\newpage
$\ $\newline    % force a new line

\section{Enhanced conduction}
\section{Virtual thin ice melting (fake lateral melting)}
\section{Ridging and rafting with a single ice category}

\end{document}