IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
nsub intseg c,a,b:. c = b-a ({a..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
c,a,b:
. c = b-a 
({a..b
} ~ 
c)
