l looks more complex than it is. The exponential
function need only be evaluated once for each unconstrained parameter
<span class="math inline">\(y_k\)</span>; everything else is just basic arithmetic that can be computed
incrementally along with the transform.</p>
</div>
<div id="unit-simplex-transform" class="section level3">
<h3>Unit Simplex Transform</h3>
<p>The transform <span class="math inline">\(Y = f(X)\)</span> can be derived by reversing the stages of the
inverse transform. Working backwards, gi