Nuprl - Proof: inv pair inv 1 3 1 1 1

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At: inv pair inv 1 3 1 1 1

1. A : Type
2. B : Type
3. (

fg.fg/f,g. <f,g,(

x.*),(

y.*)>)

(A ~ B)
4. (

fga.fga/f,#. #/g,a. <f,g>)

(A ~ B)

B
5. f : A

B
6. g : B

A
7. InvFuns(A;B;f;g)

<f,g> = <f,g>

By:

Analyze

Generated subgoal:

1 <f,g>/f,g. InvFuns(A;B;f;g)
1 step

About:

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