Nuprl - Proof: hlength eq nil

IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: hlength eq nil

'a:S.

all

(

P:hlist('a)

hbool. equal

(

P:hlist('a)

hbool. (all(

l:hlist('a). implies(equal(length(l),0),P(l)))

(

P:hlist('a)

hbool. ,P(nil)))

By:	HOL "hlength_eq_nil"

Generated subgoals:

None

About:

IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html