Nuprl - Proof: eq rat trans 1 1 1 1 1 1 1 1

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At: eq rat trans 1 1 1 1 1 1 1 1

1. x1 :

2. x2 :

3. y1 :

4. y2 :

5. z1 :

6. z2 :

7. x1

y2 = y1

x2
8. y1

z2 = z1

y2
9. x1

z2 = y1

y2
10. y1 = 0

z2 = z1

By:	(HypSubst 10 8) THEN (HypSubst 10 7)

Generated subgoal:

1 7. x1y2 = 0x2
8. 0z2 = z1y2
9. x1y2y1z2 = y1x2z1y2
10. y1 = 0
x1z2 = z1x2
5 steps

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