Nuprl - Proof: card1 iff inhabited uniquely

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At: card1 iff inhabited uniquely

A:Type. (A ~

(

By:

Auto

Generated subgoals:

1 1. A : Type
2. A ~ 1
!A
4 steps

2 1. A : Type
2. !A
A ~ 1
5 steps

About:

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1	1. A : Type 2. A ~ 1 !A	4 steps
2	1. A : Type 2. !A A ~ 1	5 steps