doc-src/Tutorial/Misc/Fib.thy
author wenzelm
Tue, 19 Feb 2002 23:49:26 +0100
changeset 12900 2be514a36aec
parent 5377 efb799c5ed3c
permissions -rw-r--r--
Paulson:1989;

Fib = WF_Rel +
consts fib  :: nat => nat
recdef fib "measure(%n. n)"
    "fib 0 = 0"
    "fib 1 = 1"
    "fib (Suc(Suc x)) = fib x + fib (Suc x)"
end