
theorem
  for F being Field holds for a,b being Element of NonZero F holds ovf(F
  ).(revf(F).a,b) = revf(F).(omf(F).(a,b))
proof
  let F be Field;
  let a,b be Element of NonZero F;
  revf(F).a is Element of F by XBOOLE_0:def 5;
  hence ovf(F).(revf(F).a,b) = omf(F).(revf(F).a,revf(F).b) by Def2
    .= revf(F).(omf(F).(a,b)) by Th3;
end;
