Nuprl - Proof: wellfounded functionality wrt iff 1 1 2

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At: wellfounded functionality wrt iff 1 1 2

1. T1 : Type
2. T2 : Type
3. r1 : T1

Prop
4. r2 : T2

Prop
5. T1 = T2
6.

x,y:T1. r1(x,y)

r2(x,y)

x,y:T1. r1(x,y)

r2(x,y)

By:	(Unfold `guard` 0) THEN UnivCD THEN (BackThru 6)

Generated subgoals:

None

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