Nuprl - Proof: counting is unique 1 1

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At: counting is unique 1 1

1. A : Type
2. m :

3. k :

4. A ~

m
5. A ~

k
6. x :

7. y :

x ~

By:	FwdThru: Thm* (f:(AB). Bij(A; B; f)) (A ~ B) onHyps [Hyp:8] THEN BackThru: Thm* (f:(mk). Inj(m; k; f)) mk

Generated subgoal:

1 9. f:(xy). Bij(x; y; f)
f:(xy). Inj(x; y; f)
2 steps

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