libs/math/doc/sf_and_dist/html/math_toolkit/policy/pol_ref/iteration_pol.html

   1 <html>
   2 <head>
   3 <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
   4 <title>Iteration Limits Policies</title>
   5 <link rel="stylesheet" href="../../../../../../../../doc/src/boostbook.css" type="text/css">
   6 <meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
   7 <link rel="home" href="../../../index.html" title="Math Toolkit">
   8 <link rel="up" href="../pol_ref.html" title="Policy Reference">
   9 <link rel="prev" href="precision_pol.html" title="Precision Policies">
  10 <link rel="next" href="policy_defaults.html" title="Using Macros to Change the Policy Defaults">
  11 </head>
  12 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
  13 <table cellpadding="2" width="100%"><tr>
  14 <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../../boost.png"></td>
  15 <td align="center"><a href="../../../../../../../../index.html">Home</a></td>
  16 <td align="center"><a href="../../../../../../../../libs/libraries.htm">Libraries</a></td>
  17 <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
  18 <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
  19 <td align="center"><a href="../../../../../../../../more/index.htm">More</a></td>
  20 </tr></table>
  21 <hr>
  22 <div class="spirit-nav">
  23 <a accesskey="p" href="precision_pol.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../pol_ref.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="policy_defaults.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a>
  24 </div>
  25 <div class="section math_toolkit_policy_pol_ref_iteration_pol">
  26 <div class="titlepage"><div><div><h4 class="title">
  27 <a name="math_toolkit.policy.pol_ref.iteration_pol"></a><a class="link" href="iteration_pol.html" title="Iteration Limits Policies">Iteration
  28         Limits Policies</a>
  29 </h4></div></div></div>
  30 <p>
  31           There are two policies that effect the iterative algorithms used to implement
  32           the special functions in this library:
  33         </p>
  34 <pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">unsigned</span> <span class="keyword">long</span> <span class="identifier">limit</span> <span class="special">=</span> <span class="identifier">BOOST_MATH_MAX_SERIES_ITERATION_POLICY</span><span class="special">&gt;</span>
  35 <span class="keyword">class</span> <span class="identifier">max_series_iterations</span><span class="special">;</span>
  36
  37 <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">unsigned</span> <span class="keyword">long</span> <span class="identifier">limit</span> <span class="special">=</span> <span class="identifier">BOOST_MATH_MAX_ROOT_ITERATION_POLICY</span><span class="special">&gt;</span>
  38 <span class="keyword">class</span> <span class="identifier">max_root_iterations</span><span class="special">;</span>
  39 </pre>
  40 <p>
  41           The class <code class="computeroutput"><span class="identifier">max_series_iterations</span></code>
  42           determines the maximum number of iterations permitted in a series evaluation,
  43           before the special function gives up and returns the result of <a class="link" href="../../main_overview/error_handling.html#evaluation_error">evaluation_error</a>.
  44         </p>
  45 <p>
  46           The class <code class="computeroutput"><span class="identifier">max_root_iterations</span></code>
  47           determines the maximum number of iterations permitted in a root-finding
  48           algorithm before the special function gives up and returns the result of
  49           <a class="link" href="../../main_overview/error_handling.html#evaluation_error">evaluation_error</a>.
  50         </p>
  51 </div>
  52 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
  53 <td align="left"></td>
  54 <td align="right"><div class="copyright-footer">Copyright &#169; 2006-2010 John Maddock, Paul A. Bristow, Hubert Holin, Xiaogang Zhang, Bruno
  55       Lalande, Johan R&#229;de, Gautam Sewani, Thijs van den Berg and Benjamin Sobotta<p>
  56         Distributed under the Boost Software License, Version 1.0. (See accompanying
  57         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
  58       </p>
  59 </div></td>
  60 </tr></table>
  61 <hr>
  62 <div class="spirit-nav">
  63 <a accesskey="p" href="precision_pol.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../pol_ref.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="policy_defaults.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a>
  64 </div>
  65 </body>
  66 </html>