diff --git a/talk.tex b/talk.tex
index 61a4866..58b80d6 100644
--- a/talk.tex
+++ b/talk.tex
@@ -116,7 +116,7 @@
 	\begin{center}
 		\begin{tabular}{cc|c|c|c|c}
 			\toprule
-			$L/a$ & $\beta$ & $\kappa_{1}\approx\kappa_{\rm cr}$ & $\kappa_{2}$ & $\kappa_{3}\approx\kappa_{\rm sym}$&$\tilde a$\\
+			$L/a$ & $\beta$ & $\kappa_{1}\approx\kappa_{\rm cr}$ & $\kappa_{2}$ & $\kappa_{3}\approx\kappa_{\rm sym}$&$\~ a$\\
 			\midrule
 			24&3.685&0.1396980&0.1395500&0.1394400&0.120\\
 			32&3.80&0.1392500&---&0.1389630&0.095\\