Nuprl - Proof: card1 iff inhabited uniquely 1 1 1

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At: card1 iff inhabited uniquely 1 1 1

1. A : Type
2. f : A

1
3. g :

A
4. InvFuns(A;

1;f;g)
5. y : A

g(0) = y

By:	Rewrite by 0 = f(y) 1

Generated subgoal:

1 g(f(y)) = y
1 step

About:

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