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

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

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

About:
equal

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