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At: not list all not iff list exists 1 1 2 1
1. T: Type
2. P: TProp
3. x:T. Dec(P(x))
4. L: T List
5. u: T
6. v: T List
7. xv.(P(x)) xv.P(x)
8. (P(u) & xv.(P(x)))

P(u) xv.P(x)
By: Inst Thm* Dec(P) Dec(Q) ((P & Q) P Q) [P(u);xv.(P(x))]
Generated subgoal:

19. (P(u) & xv.(P(x))) P(u) xv.(P(x))
P(u) xv.P(x)

About:
listdecidablefunctionuniversepropimpliesandorall

(23steps) PrintForm Definitions Lemmas list 3 jlc Sections Support(jlc) Doc