Nuprl - Proof: iso pair char 1 1 1

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At: iso pair char 1 1 1

1. 'a : S
2. 'b : S
3. P : 'b

4. rep : 'a

'b
5. abs : 'b

'a
6.

r:'b. abs(r) = (@a:'a. (r = rep(a)))
7. type_definition('b;'a;P;rep)
8. a : 'a

(@a1:'a. (rep(a) = rep(a1))) = a

By:	L Thm* P:('aType), x:'a. P(x) (y:'a. P(y) x = y) (@y:'a. P(y)) = x THEN StrongAuto

Generated subgoal:

1 9. a1 : 'a
10. rep(a) = rep(a1)
a = a1
2 steps

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