From 79650f5538f076e97a656d13b110e2e2d4d72521 Mon Sep 17 00:00:00 2001
From: ichuang <ichuang@mit.edu>
Date: Fri, 21 Feb 2014 02:04:23 +0000
Subject: [PATCH] add infinity symbol to calc preview

---
 common/lib/calc/calc/preview.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/common/lib/calc/calc/preview.py b/common/lib/calc/calc/preview.py
index 3f0e745c59..075a134303 100644
--- a/common/lib/calc/calc/preview.py
+++ b/common/lib/calc/calc/preview.py
@@ -119,6 +119,9 @@ def enrich_varname(varname):
     # add hbar for QM
     greek.append('hbar')
 
+    # add infinity
+    greek.append('infty')
+
     if varname in greek:
         return ur"\{letter}".format(letter=varname)
     else: