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1. T: Type
2. n:
3. f: nT
4. Inj(n; T; f)
5. b:T. a:n. f(a) = b
6. t: T
7. a: n
8. f(a) = t

mem_f(T;t;(f)[n])

By: Inst Thm* n:, f:(nT), i:n. ((f)[n])[i] = f(i) [T;n;f;a]

Generated subgoal:

19. ((f)[n])[a] = f(a)
mem_f(T;t;(f)[n])


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