(9steps total) PrintForm Definitions Lemmas ElisTarskiPf A Sections NuprlLIB Doc

At: s1 1 2
1. t: Term
2. s(t) = SUBX(f(t); f(t))
s(t) = SUBX(t; SUBX(f(t); UP(f(t))))
By: Unfold `subx` 2
Generated subgoal:

12. s(t) = f(t)[f(t)/X]
s(t) = SUBX(t; SUBX(f(t); UP(f(t))))		5 steps

About:
equal

(9steps total) PrintForm Definitions Lemmas ElisTarskiPf A Sections NuprlLIB Doc