Nuprl - Proof: equivrel characterization 2 1 1

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At: equivrel characterization 2 1 1

1. A : Type
2. R : A

Prop
3.

x:A. R(x,x) & (

y:A. R(x,y)

R(y,x) & (

z:A. R(y,z)

R(x,z)))
4. a : A

R(a,a)

By:	BackThru 3

Generated subgoals:

None

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