mathtext examples from Bonn

examples/mathtext/LogicGer.gf

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+concrete LogicGer of Logic = SymbolsX ** LogicI - [Exist] with
+  (LexLogic = LexLogicGer),
+  (Lang = LangGer),
+  (Syntax = SyntaxGer),
+  (Symbolic = SymbolicGer) ** open SyntaxGer, (P = ParadigmsGer) in {
+
+lin
+  --- to get the extraposited clause in correct place
+  Exist xs A B = 
+    Lang.SSubjS
+    (mkS (mkCl (indef xs.p2 
+      (mkCN (mkCN A xs.p1) (P.mkAdv "derart")))))
+    that_Subj B ;
+
+} ;