rec-complexes1

complexes

W3C sample WIRIS
17 29
<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <in/>
    <cn type="complex-cartesian">17
      <sep/>29
    </cn>
    <complexes/>
  </apply>
</math>

Author: MathML 2 Recommendation