Nuprl - Proof: nsub inj exteq nsub surj 1 1 1 1 1 2 1

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At: nsub inj exteq nsub surj 1 1 1 1 1 2 1

1. k :

2. f :

k inj

k
3. f

k
4. Inj(

k; f)
5.

(

k. f(a) = b))
6.

(

k. f(a) = b)
7. b :

k. f(a) = b

By:	Witness6: b

Generated subgoal:

1 8. (a:k. f(a) = b)
a:k. f(a) = b
1 step

About:

IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html