theorem Th36:
  (i ';' j ';' K).0 = i
 proof
  LastLoc(i ';' j) = 2 by Th30;
  hence (i ';' j ';' K).0 = (i ';' j).0 by Th23,Th28
        .= (i ';' Macro j).0
        .= i by Th35;
 end;
