ion_area.svg" align="middle"></span>
    </p>
<p>
      and is also illustrated by a 3D plot.
    </p>
<p>
      <span class="inlinemediaobject"><img src="../../graphs/plot_owens_3d_xyp.png"></span>
    </p>
<p>
      This function is used in the computation of the <a class="link" href="dist_ref/dists/skew_normal_dist.html" title="Skew Normal Distribution">Skew
      Normal Distribution</a>. It is also used in the computation of bivariate
      and multivariate normal distribution probabilities. The return 