arctanh3

1 / arctanh(t)

W3C sample	WIRIS
	$\frac{1}{\mathrm{arctanh\,}t}$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <divide/>
    <cn>1</cn>
    <apply>
      <arctanh/>
      <ci>t</ci>
    </apply>
  </apply>
</math>

Author: Design Science, Inc. (E. Cannon, E. Tabacman, R.Miner)