diff -r 628d87767434 -r 08519594b0e4 doc-src/Tutorial/Recdef/ack
--- a/doc-src/Tutorial/Recdef/ack	Mon Nov 29 11:12:19 2004 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,5 +0,0 @@
-consts ack :: "nat*nat => nat"
-recdef ack "measure(%m. m) <*lex*> measure(%n. n)"
-  "ack(0,n)         = Suc n"
-  "ack(Suc m,0)     = ack(m, 1)"
-  "ack(Suc m,Suc n) = ack(m,ack(Suc m,n))"