1 files changed, 6 insertions, 0 deletions
diff --git a/grammars/multiple/SystemMathEng.gf b/grammars/multiple/SystemMathEng.gf
new file mode 100644
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+++ b/grammars/multiple/SystemMathEng.gf
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+concrete SystemMathEng of SystemMath = SystemEng, MathEng ** open
+  Prelude in {
+  lin
+    RSum x y d = 
+      ss (["the sum of"] ++ x.s ++ "and" ++ y.s ++ "is" ++ d.s) ;
+} ;