--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc-src/Tutorial/Misc/Ackermann.thy	Wed Aug 26 17:27:27 1998 +0200
@@ -0,0 +1,7 @@
+Ackermann = WF_Rel +
+consts ack :: "nat * nat => nat"
+recdef ack "measure(%m. m) ** 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))"
+end