lie-algebras-and-their-representations

diff --git a/sections/mathieu.tex b/sections/mathieu.tex
@@ -1,4 +1,4 @@
-\chapter{Irreducible Weight Modules}
+\chapter{Irreducible Weight Modules}\label{ch:mathieu}
 
 \begin{definition}
   A representation \(V\) of \(\mathfrak{g}\) is called a \emph{weight

diff --git a/sections/semisimple-algebras.tex b/sections/semisimple-algebras.tex
@@ -12,7 +12,6 @@ Lie algebra? This is a question that have sparked an entire field of research,
 and we cannot hope to provide a comprehensive answer the 40 pages we have left.
 Nevertheless, we can work on particular cases.
 
-% TODO: Add a reference to the next chapter when it's done
 Like any sane mathematician would do, we begin by studying a simpler case. The
 restrictions we impose are twofold: restrictions on the algebras whose
 representations we'll classify, and restrictions on the representations
@@ -21,7 +20,8 @@ algebras over an algebraically closed field \(K\) of characteristic \(0\). This
 is a restriction we will carry throughout these notes. Moreover, as indicated
 by the title of this chapter, we will initially focus on the so called
 \emph{semisimple} Lie algebras algebras -- we will later relax this restriction
-a bit in the next chapter when we dive into \emph{reductive} Lie algebras.
+a bit in chapter~\ref{ch:mathieu} when we dive into \emph{reductive} Lie
+algebras.
 
 There are multiple equivalent ways to define what a semisimple Lie algebra is.
 Perhaps the most common definition is\dots