theorem
  Rea (<j>*') = 0 & Im1 (<j>*') = 0 & Im2 (<j>*') = -1 & Im3 (<j>*') = 0
proof
  <j>*' = [*zz,zz,-jj,zz*] by Th24,Th36;
  hence thesis by Th16;
end;
