--- loncom/homework/math_parser/Tokenizer.pm	2015/06/29 15:42:13	1.1
+++ loncom/homework/math_parser/Tokenizer.pm	2023/03/13 22:31:22	1.3
@@ -1,6 +1,8 @@
 # The LearningOnline Network with CAPA - LON-CAPA
 # String tokenizer
 #
+# $Id: Tokenizer.pm,v 1.3 2023/03/13 22:31:22 raeburn Exp $
+#
 # Copyright (C) 2014 Michigan State University Board of Trustees
 #
 # This program is free software: you can redistribute it and/or modify
@@ -182,7 +184,7 @@ main:
         
         # names
         if (($c ge 'a' && $c le 'z') || ($c ge 'A' && $c le 'Z') ||
-                ($c ge 'α' && $c le 'ω') || ($c ge 'Α' && $c le 'Ω') || $c eq 'µ') {
+                ($c ge 'α' && $c le 'ω') || ($c ge 'Α' && $c le 'Ω') || $c eq 'µ' || $c eq '°') {
             $value = $c;
             $i++;
             for (;;) {