ception">NumberIsTooSmallException</a>,
                                                   <a href="../../../../../../org/apache/commons/math3/exception/NonMonotonicSequenceException.html" title="class in org.apache.commons.math3.exception">NonMonotonicSequenceException</a></pre>
<div class="block">Return a copy of the divided difference array.
 <p>
 The divided difference array is defined recursively by <pre>
 f[x0] = f(x0)
 f[x0,x1,...,xk] = (f[x1,...,xk] - f[x0,...,x[k-1]]) / (xk - x0)
 </pre></p>
 <p>
 