Mercurial Mercurial > repos > isabelle / file revision
summary | shortlog | changelog | graph | tags | bookmarks | branches | files | changeset | file | latest | revisions | annotate | diff | comparison | raw | help
Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
doc-src/Tutorial/Misc/Ackermann.thy
author nipkow
Thu, 13 Dec 2001 19:05:10 +0100
changeset 12492 a4dd02e744e0
parent 5377 efb799c5ed3c
permissions -rw-r--r--
*** empty log message ***

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
isabelle