Nuprl Basics - Proof: sfa doc type poly swap 1 1 1

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At: sfa doc type poly swap 1 1 1

1. f :

C,D:Type. C

C
2. A : Type
3. B : Type
4. a : A
5. b : B
6. f

{a:A}

{b:B}

{a:A}
7. z : {b:B}

{a:A}

z = <b,a>

By:

Analyze-1

Generated subgoal:

1 7. z1 : {b:B}
8. z2 : {a:A}
<z1,z2> = <b,a> BA
3 steps

About:

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