allow capital Greek letters

1 files changed, 26 insertions, 1 deletions

diff --git a/parser.php b/parser.php
index 4423c38..80e01c2 100644
--- a/parser.php
+++ b/parser.php
@@ -623,7 +623,32 @@ class qtype_algebra_parser_variable extends qtype_algebra_parser_term {
         'phi',
         'chi',
         'psi',
-        'omega'
+        'omega',
+
+        'Alpha',
+        'Beta',
+        'Gamma',
+        'Delta',
+        'Epsilon',
+        'Zeta',
+        'Eta',
+        'Theta',
+        'Iota',
+        'Kappa',
+        'Lambda',
+        'Mu',
+        'Nu',
+        'Xi',
+        'Omicron',
+        'Pi',
+        'Rho',
+        'Sigma',
+        'Tau',
+        'Upsilon',
+        'Phi',
+        'Chi',
+        'Psi',
+        'Omega',
      );
 
     /**