IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
sum via intseg split mid2 is_assoc_sep(; (x,y. x+y))
By:
Analyze THEN Reduce Concl
Generated subgoal:
1
1. x : y@0,y:. x+y@0+y = x+y@0+y
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About:
IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html