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Def let w,x,y,z = a in t(w;x;y;z) == a/w,zz1. zz1/x,zz2. zz2/y,z. t(w;x;y;z)
No mentions to report in StandardLib.
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html