Def even(n) == if n=0 then true else even(n-1) fi   (recursive)

is mentioned by

Thm* n:. n>0  even(n) = even(n-1)	[even_pos]
Thm* even(0) = true	[even_zero]
Def even == n:. even(n)	[heven]

Try larger context: HOLlib IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html