first derivation at x.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>x</code> - </dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the first derivation at x</dd>
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<h4>solve</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;solve&#8203;(double[][]&nbsp;A,
                  double[]&nbsp;b)</pre>
<div class="block">Solves Ax=b and stores the solutio