diff --git a/Arrangement_2/doc_tex/Sweep_line_2_ref/intro.tex b/Arrangement_2/doc_tex/Sweep_line_2_ref/intro.tex
index f515ecc394a..670bffa0ee1 100644
--- a/Arrangement_2/doc_tex/Sweep_line_2_ref/intro.tex
+++ b/Arrangement_2/doc_tex/Sweep_line_2_ref/intro.tex
@@ -1,7 +1,6 @@
 \chapter{2D Intersection of Curves}
 \ccChapterAuthor{Baruch Zukerman \and Ron Wein}
 
-\subsection*{Introduction}
 
 This chapter describes three functions implemented using the
 sweep-line algorithm: given a collection ${\mathcal C}$ of