 method is included for completeness, for
 testing purposes, for educational purposes, for comparison to other
 algorithms, etc. It is however <strong>not</strong> intended to be used
 for actual problems, as one of the bounds often remains fixed, resulting
 in very slow convergence. Instead, one of the well-known modified
 <em>Regula Falsi</em> algorithms can be used (<a href="../../../../../../org/apache/commons/math3/analysis/solvers/IllinoisSolver.html" title="class in org.apache.commons.math3.analysis.