IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
intseg shift by a,b,c:. {a..b} ~ {(a+c)..(b+c)}
By:
Auto THEN BackThru: Thm*a,b,a',b':. b-a = b'-a' ({a..b} ~ {a'..b'})
Generated subgoals:
None
About:
IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
a,b,c:
. {a..b
} ~ {(a+c)..(b+c)
({a..b
