Nuprl - Proof: card settype sq 1 1

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At: card settype sq 1 1

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

Prop
4. B' : A'

Prop
5. f : A

A'
6. Bij(A; A'; f)
7.

x:A.

B(x)

B'(f(x))

{x:A|

B(x) } ~ {x:A'|

B'(x) }

By:	Use:[f] BackThru: Thm* Bij(A; A'; f) Thm* Thm* (x:A. B(x) B'(f(x))) ({x:A\| B(x) } ~ {x:A'\| B'(x) })

Generated subgoals:

None

About:

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