title: Algorithm of boost::math::erf
body: <p>are there any details available for the algorithm behind the erf-function of boost? The documentation of the module is not very precise. All I found out is that several methods are mixed. For me it looks like variations of Abramowitz and Stegun.</p>
  
  <ul>
  <li>Which methods are mixed?</li>
  <li>How are the methods mixed?</li>
  <li>What is the complexity of the erf-function (constant time)?</li>
  </ul>
  
  <p>Sebastian</p>