1 files changed, 11 insertions, 0 deletions
diff --git a/old-examples/model/Math.gf b/old-examples/model/Math.gf
new file mode 100644
index 000000000..036cab294
--- /dev/null
+++ b/old-examples/model/Math.gf
@@ -0,0 +1,11 @@
+abstract Math = {
+
+  cat Prop ; Elem ;
+
+  fun 
+    And  : Prop -> Prop -> Prop ;
+    Even : Elem -> Prop ;
+    Odd  : Elem -> Prop ;
+    Zero : Elem ;
+
+}