mb event system 1 Sections EventSystems Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
Def lnk-inv(l) == <1of(2of(l)),1of(l),2of(2of(l))>

is mentioned by

Thm* l:IdLnk. lnk-inv(lnk-inv(l)) = l  IdLnk[lnk-inv-inv]

Try larger context: EventSystems IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html

mb event system 1 Sections EventSystems Doc