Nuprl - Proof: equivrel characterization 1 1 1 2 1

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At: equivrel characterization 1 1 1 2 1

1. A : Type
2. R : A

Prop
3. Refl(A;x,y.R(x,y))
4. Sym x,y:A. R(x,y)
5. Trans x,y:A. R(x,y)
6. x : A
7. y : A
8. R(x,y)

R(y,x)

By:	UnfoldTopAb 4 THEN BackThru 4

Generated subgoals:

None

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