restored the summer school and Resource-HOWTO documents

examples/jem-math/MathI.gf

@@ -0,0 +1,51 @@
+incomplete concrete MathI of Math = open 
+  Syntax,
+  Mathematical,
+  LexMath,
+  Prelude in {
+
+lincat 
+  Prop = S ;
+  Exp = NP ;
+
+lin
+  And = mkS and_Conj ;
+  Or  = mkS or_Conj ;
+  If a = mkS (mkAdv if_Subj a) ;
+
+  Zero = mkNP zero_PN ;
+  Successor = funct1 successor_N2 ;
+
+  Sum = funct2 sum_N2 ;
+  Product = funct2 product_N2 ;
+
+  Even = pred1 even_A ;
+  Odd = pred1 odd_A ;
+  Prime = pred1 prime_A ;
+  
+  Equal = pred2 equal_A2 ;
+  Less = predC small_A ;
+  Greater = predC great_A  ;
+  Divisible = pred2 divisible_A2 ;
+
+oper
+  funct1 : N2 -> NP -> NP = \f,x -> mkNP the_Art (mkCN f x) ;
+  funct2 : N2 -> NP -> NP -> NP = \f,x,y -> mkNP the_Art (mkCN f (mkNP and_Conj x y)) ;
+
+  pred1 : A -> NP -> S = \f,x -> mkS (mkCl x f) ;
+  pred2 : A2 -> NP -> NP -> S = \f,x,y -> mkS (mkCl x f y) ;
+  predC : A -> NP -> NP -> S = \f,x,y -> mkS (mkCl x f y) ;
+
+lincat 
+  Var = Symb ;
+lin
+  X = MkSymb (ss "x") ;
+  Y = MkSymb (ss "y") ;
+
+  EVar x = mkNP (SymbPN x) ;
+  EInt i = mkNP (IntPN i) ;
+
+  ANumberVar x = mkNP a_Art (mkCN (mkCN number_N) (mkNP (SymbPN x))) ;
+  TheNumberVar x = mkNP the_Art (mkCN (mkCN number_N) (mkNP (SymbPN x))) ;
+
+}