rec-selector2

W3C sample	WIRIS
	$A_{3, 2}$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <selector/>
    <ci type="matrix">A</ci>
    <cn>3</cn>
    <cn>2</cn>
  </apply>
</math>

Author: MathML 2 Recomendation