Def even == n:. even(n)

is mentioned by

Thm* and(equal(even(0),t),all(n:hnum. equal(even(suc(n)),not(even(n)))))

[heven_wd]

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