Nuprl - Pf add_action

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1. St: Type
2. l: St*
3. f: StSt
4. s: St
5. u: St
6. v: St*
7. mem_f(St;s;(+f)(v)) mem_f(St;s;v) (s':St. mem_f(St;s';v) & f(s') = s)
8. mem_f(St;s;(+f)(v))

u = s mem_f(St;s;v) (s':St. u = s' mem_f(St;s';v) & f(s') = s)

By: FwdThru 7 [8] THEN Analyze -1

Generated subgoals:

1 9. mem_f(St;s;v)
u = s mem_f(St;s;v) (s':St. u = s' mem_f(St;s';v) & f(s') = s)

2 9. s':St. mem_f(St;s';v) & f(s') = s
u = s mem_f(St;s;v) (s':St. u = s' mem_f(St;s';v) & f(s') = s)

About:

1	9. `mem_f(St;s;v)` `u = s mem_f(St;s;v) (s':St. u = s' mem_f(St;s';v) & f(s') = s)`
2	9. `s':St. mem_f(St;s';v) & f(s') = s` `u = s mem_f(St;s;v) (s':St. u = s' mem_f(St;s';v) & f(s') = s)`