Hessian

Find the Hessian matrix of yac symbol

Interface to the 'yacas' computer algebra system (<http://www.yacas.org/>).

Mikkel Andersen

<dl><dt>expr</dt>
<dd>A <code>yac_symbol</code></dd>
<dt>...</dt>
<dd>variables as character vector to take Hessian with respect to</dd></dl>

<dl>

<dt>expr</dt>
<dd>A <code>yac_symbol</code></dd>


<dt>...</dt>
<dd>variables as character vector to take Hessian with respect to</dd>

</dl>