diff --git a/tex-stuff/math.tex b/tex-stuff/math.tex
index b4ad0e9..1035abb 100644
--- a/tex-stuff/math.tex
+++ b/tex-stuff/math.tex
@@ -31,7 +31,7 @@ $v = xg_1$ and $w = xg_2$.
 
 Alice proves that an El Gamal encrypted value $(\alpha, \beta) = (m + ry, rg)$
 either decrypts to $0$ or to the fixed value $g$ without revealing which is the
-case, in other words, it is shown that $m \epsilon \{0, g\}$.
+case, in other words, it is shown that $m \in \{0, g\}$.
 
 If $m = 0$: