1 files changed, 29 insertions, 4 deletions
diff --git a/ac/n.lyx b/ac/n.lyx
index ad6cd34..d405db4 100644
--- a/ac/n.lyx
+++ b/ac/n.lyx
@@ -7,10 +7,6 @@
 \textclass book
 \begin_preamble
 \input{../defs}
-\usepackage[x11names, svgnames, rgb]{xcolor}
-%\usepackage[utf8]{inputenc}
-\usepackage{tikz}
-\usetikzlibrary{snakes,arrows,shapes}
 \end_preamble
 \use_default_options true
 \begin_modules
@@ -157,6 +153,35 @@ Alberto del Valle Robles.
 Clases de Manuel Saorín Castaño.
 \end_layout
 
+\begin_layout Standard
+\begin_inset ERT
+status open
+
+\begin_layout Plain Layout
+
+
+\backslash
+begin{exinfo}
+\end_layout
+
+\end_inset
+
+Los párrafos marcados como este proceden de ejercicios del libro.
+\begin_inset ERT
+status open
+
+\begin_layout Plain Layout
+
+
+\backslash
+end{exinfo}
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
 \begin_layout Chapter
 Anillos conmutativos
 \end_layout