gf-book web page index and toc

1 files changed, 0 insertions, 30 deletions

diff --git a/book/examples/chapter6/Arithm.gf b/book/examples/chapter6/Arithm.gf
deleted file mode 100644
index 685627745..000000000
--- a/book/examples/chapter6/Arithm.gf
+++ /dev/null
@@ -1,30 +0,0 @@
-abstract Arithm = {
-  cat
-    Prop ;                        -- proposition
-    Nat ;                         -- natural number
-  data
-    Zero : Nat ;                  -- 0
-    Succ : Nat -> Nat ;           -- the successor of x
-  fun
-    Even : Nat -> Prop ;          -- x is even
-    And  : Prop -> Prop -> Prop ; -- A and B
-
-  cat Less Nat Nat ; 
-  data LessZ : (y : Nat) -> Less Zero (Succ y) ;
-  data LessS : (x,y : Nat) -> Less x y -> Less (Succ x) (Succ y) ;
-
-  cat Span ;
-  data FromTo : (m,n : Nat) -> Less m n -> Span ;
-
-  fun one : Nat ;
-  def one = Succ Zero ;
-
-  fun twice : Nat -> Nat ;
-  def twice x = plus x x ;
-
-  fun plus : Nat -> Nat -> Nat ;
-  def 
-    plus x Zero = x ;
-    plus x (Succ y) = Succ (plus x y) ;
-
-}