theorem
  Rea (<i>*') = 0 & Im1 (<i>*') = -1 & Im2 (<i>*') = 0 & Im3 (<i>*') = 0
proof
  <i>*' = [*zz, -jj, zz, zz*] by Th23,Th36;
  hence thesis by Th16;
end;
