rec-imaginaryi1

imaginary i

W3C sample	WIRIS
	$i^2=-1$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <eq/>
    <apply>
      <power/>
      <imaginaryi/>
      <cn>2</cn>
    </apply>
    <cn>-1</cn>
  </apply>
</math>

Author: MathML 2 Recommendation