1 files changed, 10 insertions, 0 deletions
diff --git a/mgr.tex b/mgr.tex
index 4c95210..9aa3d92 100644
--- a/mgr.tex
+++ b/mgr.tex
@@ -213,6 +213,8 @@ Binary trees are trees where each node has either no children (the node is a
 leaf), or exactly two children (which, based on their order, can be called the
 left and the right child).
 
+\subsubsection{Tree traversals}
+
 The \definedterm{post-order} of $V(T)$ is an ordering of $T$'s vertices produced
 by the following recursive procedure:
 
@@ -229,6 +231,14 @@ recursive procedure:
     \item Traverse the root's subtrees.
 \end{enumerate}
 
+Finally, the following procedure produces the \definedterm{in-order} of $V(T)$:
+
+\begin{enumerate}
+    \item First traverse the left subtree.
+    \item Visit the root.
+    \item Traverse the right subtree.
+\end{enumerate}
+
 \subsection{Tree automata}
 
 Consider the case of binary trees labeled with $\Sigma$. A