1 files changed, 1 insertions, 1 deletions
diff --git a/cyn/n4.lyx b/cyn/n4.lyx
index 50a4550..52b35f2 100644
--- a/cyn/n4.lyx
+++ b/cyn/n4.lyx
@@ -125,7 +125,7 @@ Sea
 \end_inset
 
 , su clase de equivalencia es 
-\begin_inset Formula $[a]=\{b\in A:a\sim b\}$
+\begin_inset Formula $[a]=\{b\in A\mid a\sim b\}$
 \end_inset
 
 .