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At: prod fin is fin


T:Type, t:T. Fin(T) Fin(TT)

By:
Unfold `finite` 0
THEN
ExRepD


Generated subgoal:

11. T: Type
2. t: T
3. n:
4. f: nT
5. Bij(n; T; f)
n:, f:(nTT). Bij(n; TT; f)


About:
alluniverseimpliesproductexistsfunctionnatural_number