root@sage:~/aldor-src/aldor/install/aldor# aldor Categories.as
root@sage:~/aldor-src/aldor/install/aldor# diff -au Categoris.as_orig Categories.as
diff: Categoris.as_orig: No such file or directory
root@sage:~/aldor-src/aldor/install/aldor# diff -au Categories.as_orig Categories.as
--- Categories.as_orig  2007-11-08 10:09:11.000000000 -0800
+++ Categories.as       2007-11-08 10:11:54.000000000 -0800
@@ -64,14 +64,14 @@
 define Product(Obj:Category):Category == with
     Product: (A:Obj,B:Obj) -> ( AB:Obj, AB->A, AB->B, (X:Obj)->(X->A,X->B)->(X->AB) )
     Product: (A1:Obj,B1:Obj,  A2:Obj,B2:Obj) -> (AB1:Obj,AB2:Obj,(A1->A2,B1->B2)->(AB1->AB2))
-    *:(Obj,Obj)->Obj
+    *:(Obj,Obj)->Obj with {}
     default
         Product(A1:Obj,B1:Obj,A2:Obj,B2:Obj):(AB1:Obj,AB2:Obj,(A1->A2,B1->B2)->(AB1->AB2)) ==
            (ab1:Obj,pa1:ab1->A1,pb1:ab1->B1, product1: (X:Obj) -> (X->A1,X->B1) -> (X->ab1)) == Product(A1,B1)
            (ab2:Obj,pa2:ab2->A2,pb2:ab2->B2, product2: (X:Obj) -> (X->A2,X->B2) -> (X->ab2)) == Product(A2,B2)
            (f:A1->A2)*(g:B1->B2):(ab1->ab2) == product2 ( ab1 )( (x:ab1):A2 +-> f pa1 x, (x:ab1):B2 +-> g pb1 x )
            (ab1,ab2,*)
-        (A:Obj)*(B:Obj):Obj ==
+        (A:Obj)*(B:Obj):Obj with {} ==
             (AB:Obj,pa:AB->A,pb:AB->B,product:(X:Obj)->(X->A,X->B)->(X->AB)) == Product(A,B)
             AB add

@@ -81,14 +81,14 @@
 define CoProduct(Obj:Category):Category == with
     CoProduct: (A:Obj,B:Obj) -> ( AB:Obj, A->AB, B->AB, (X:Obj)->(A->X,B->X)->(AB->X) )
     CoProduct: (A1:Obj,B1:Obj, A2:Obj,B2:Obj) -> (AB1:Obj,AB2:Obj,(A2->A1,B2->B1)->(AB2->AB1))
-    +:(Obj,Obj)->Obj
+    +:(Obj,Obj)->Obj with {}
     default
         CoProduct(A1:Obj,B1:Obj,A2:Obj,B2:Obj):(AB1:Obj,AB2:Obj,(A2->A1,B2->B1)->(AB2->AB1)) ==
            (ab1:Obj,ia1:A1->ab1,ib1:B1->ab1, sum1: (X:Obj) -> (A1->X,B1->X) -> (ab1->X)) == CoProduct(A1,B1)
            (ab2:Obj,ia2:A2->ab2,ib2:B2->ab2, sum2: (X:Obj) -> (A2->X,B2->X) -> (ab2->X)) == CoProduct(A2,B2)
            (f:A2->A1)+(g:B2->B1):(ab2->ab1) == sum2 ( ab1 ) ( (x:A2):ab1 +-> ia1 f x, (x:B2):ab1 +-> ib1 g x )
            (ab1,ab2,+)
-        (A:Obj)+(B:Obj):Obj ==
+        (A:Obj)+(B:Obj):Obj with {} ==
             (AB:Obj,ia:A->AB,ib:B->AB,product:(X:Obj)->(A->X,B->X)->(AB->X)) == CoProduct(A,B)
             AB add

@@ -97,9 +97,9 @@
 +++
 define MultiProduct(Obj:Category):Category == with
     Product:(A:Obj,n:Integer)   -> (Prod:Obj,Integer->(Prod->A),(X:Obj)->(Tuple (X->A))->(X->Prod))
-    ^:(Obj,Integer) -> Obj
+    ^:(Obj,Integer) -> Obj with {}
     default
-        (A:Obj)^(n:Integer):Obj ==
+        (A:Obj)^(n:Integer):Obj with {} ==
            (Prod:Obj,project:Integer->(Prod->A),product:(X:Obj)->(Tuple (X->A))->(X->Prod)) == Product(A,n)
            Prod add

@@ -108,9 +108,9 @@
 +++
 define CoMultiProduct(Obj:Category):Category == with
     CoProduct:(A:Obj,n:Integer) -> ( Sum:Obj,Integer->(A->Sum),(X:Obj)->(Tuple (A->X))->(Sum->X))
-    ..:(Obj,Integer) -> Obj
+    ..:(Obj,Integer) -> Obj with {}
     default
-        (A:Obj)..(n:Integer):Obj ==
+        (A:Obj)..(n:Integer):Obj with {} ==
            (Sum:Obj,insert:Integer->(A->Sum),sum:(X:Obj)->(Tuple (A->X))->(Sum->X)) == CoProduct(A,n)
            Sum add

root@sage:~/aldor-src/aldor/install/aldor#