--- loncom/interface/entities.pm	2008/11/21 20:17:11	1.18
+++ loncom/interface/entities.pm	2014/08/25 18:02:48	1.21
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # entity -> tex.
 #
-# $Id: entities.pm,v 1.18 2008/11/21 20:17:11 jms Exp $
+# $Id: entities.pm,v 1.21 2014/08/25 18:02:48 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -651,14 +651,15 @@ my %entities = (
 
     # Arrows and then some (harpoons from Hon Kie).
 
-    8592     => '\textleftarrow',
-    'larr'   => '\textleftarrow',
-    8593     => '\textuparrow',
-    'uarr'   => '\textuparrow',
-    8594     => '\textrightarrow',
-    'rarr'   => '\textrightarrow',
-    8595     => '\textdownarrow',
-    'darr'   => '\textdownarrow',
+    8592     => '\ensuremath{\leftarrow}',
+    'larr'   => '\ensuremath{\leftarrow}',
+    8593     => '\ensuremath{\uparrow}',
+    'uarr'   => '\ensuremath{\uparrow}',
+    8594     => '\ensuremath{\rightarrow}',
+    'rarr'   => '\ensuremath{\rightarrow}',
+    'rightarrow' => '\ensuremath{\rightarrow}',
+    8595     => '\ensuremath{\downarrow}',
+    'darr'   => '\ensuremath{\downarrow}',
     8596     => '\ensuremath{\leftrightarrow}',
     'harr'   => '\ensuremath{\leftrightarrow}',
     8598     => '\ensuremath{\nwarrow}',
@@ -788,7 +789,10 @@ my %entities = (
     'cong'   => '\ensuremath{\cong}',
     8773     => '\ensuremath{\cong}',
     8775     => '\ensuremath{\ncong}',
+    8776     => '\ensuremath{\approx}',
+    'approx' => '\ensuremath{\approx}', 
     8778     => '\ensuremath{\approxeq}',
+    'approxeq' => '\ensuremath{\approxeq}',
     8784     => '\ensuremath{\doteq}',
     8785     => '\ensuremath{\doteqdot}',
     8786     => '\ensuremath{\fallingdotseq}',