Nuprl - Proof: iso pair char 1 2 1 1 1

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At: iso pair char 1 2 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.

x',x'':'a. rep(x') = rep(x'')

x' = x''
8.

x:'b. P(x)

(

x':'a. x = rep(x'))
9. r : 'b
10. P(r)

a:'a. r = rep(a)

By:	InstHyp [r] 8

Generated subgoal:

1 11. P(r)  (x':'a. r = rep(x'))
12. (P(r))  (x':'a. r = rep(x'))
  a:'a. r = rep(a)
1 step

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