rec-complexes1

complexes

W3C sample WIRIS
[N/A] in complex_cartesian 17 29 C 
<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <csymbol cd="set1">in</csymbol>
    <apply>
      <csymbol cd="complex1">complex_cartesian</csymbol>
      <cn>17</cn>
      <cn>29</cn>
    </apply>
    <csymbol cd="setname1">C</csymbol>
  </apply>
</math>

Author: MathML 2 Recommendation