IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
append assoc sq as,bs,cs:Top List. ((as @ bs) @ cs) ~ (as @ bs @ cs)
By:
InductionOnList THEN Reduce 0 THEN UnivCD THEN Analyze THEN Try BackThruSomeHyp
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
as,bs,cs:Top List. ((as @ bs) @ cs) ~ (as @ bs @ cs)
