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At: one2one preserves fin 1 1
1. T: Type
2. U: Type
3. T ~ U
4. Fin(T)

Fin(U)
By: Analyze 3
Generated subgoal:

13. f: TU
4. g:(UT). InvFuns(T; U; f; g)
5. Fin(T)
Fin(U)

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