diff --git a/advanced-math/1-limit/limit.tex b/advanced-math/1-limit/limit.tex
index 5d6038c..74d9735 100644
--- a/advanced-math/1-limit/limit.tex
+++ b/advanced-math/1-limit/limit.tex
@@ -489,6 +489,8 @@ $\therefore a=1;b=-\dfrac{5}{2}$
 
 \subsection{极限存在性}
 
+
+
 \subsection{极限唯一性}
 
 若极限存在则必然唯一。