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From l..@apache.org
Subject svn commit: r786885 - in /commons/proper/math/trunk/src/site/xdoc: changes.xml userguide/ode.xml
Date Sat, 20 Jun 2009 19:06:55 GMT
Author: luc
Date: Sat Jun 20 19:06:55 2009
New Revision: 786885

URL: http://svn.apache.org/viewvc?rev=786885&view=rev
Log:
documented Adams-Bashforth and Adams-Moulton ODE integrators

Modified:
    commons/proper/math/trunk/src/site/xdoc/changes.xml
    commons/proper/math/trunk/src/site/xdoc/userguide/ode.xml

Modified: commons/proper/math/trunk/src/site/xdoc/changes.xml
URL: http://svn.apache.org/viewvc/commons/proper/math/trunk/src/site/xdoc/changes.xml?rev=786885&r1=786884&r2=786885&view=diff
==============================================================================
--- commons/proper/math/trunk/src/site/xdoc/changes.xml (original)
+++ commons/proper/math/trunk/src/site/xdoc/changes.xml Sat Jun 20 19:06:55 2009
@@ -312,10 +312,11 @@
       </action>
       <action dev="luc" type="add">
         New ODE integrators have been added: the explicit Adams-Bashforth and implicit
-        Adams-Moulton multistep methods. These methods support customizable starter
-        integrators and support discrete events even during the start phase.
-        All these methods provide the same rich features has the existing ones:
-        continuous output, step handlers, discrete events, G-stop ...
+        Adams-Moulton multistep methods. As the implementations of these methods are based
+        on Nordsieck vector rather than a traditional array of previous steps, they both
+        have been improved to handle adaptive stepsize. These methods provide the same rich
+        features has the existing ones: continuous output, step handlers, discrete events,
+        G-stop ...
       </action>
       <action dev="luc" type="fix" issue="MATH-214" >
         Replaced size adjustment of all steps of fixed steps Runge-Kutta integrators by

Modified: commons/proper/math/trunk/src/site/xdoc/userguide/ode.xml
URL: http://svn.apache.org/viewvc/commons/proper/math/trunk/src/site/xdoc/userguide/ode.xml?rev=786885&r1=786884&r2=786885&view=diff
==============================================================================
--- commons/proper/math/trunk/src/site/xdoc/userguide/ode.xml (original)
+++ commons/proper/math/trunk/src/site/xdoc/userguide/ode.xml Sat Jun 20 19:06:55 2009
@@ -209,7 +209,10 @@
       </subsection>
       <subsection name="13.4 Integrators" href="integrators">
         <p>
-          The tables below show the various integrators available for non-stiff problems.
+          The tables below show the various integrators available for non-stiff problems.
Note that the
+          implementations of Adams-Bashforth and Adams-Moulton are adaptive stepsize, not
fixed stepsize
+          as is usual for these multi-step integrators. This is due to the fact the implementation
relies
+          on the Nordsieck vector representation of the state.
         </p>
         <p>
           <table border="1" align="center">
@@ -229,7 +232,9 @@
           <tr><td><a href="../apidocs/org/apache/commons/math/ode/nonstiff/HighamHall54Integrator.html">Higham
and Hall</a></td><td>5</td><td>4</td></tr>
           <tr><td><a href="../apidocs/org/apache/commons/math/ode/nonstiff/DormandPrince54Integrator.html">Dormand-Prince
5(4)</a></td><td>5</td><td>4</td></tr>
           <tr><td><a href="../apidocs/org/apache/commons/math/ode/nonstiff/DormandPrince853Integrator.html">Dormand-Prince
8(5,3)</a></td><td>8</td><td>5 and 3</td></tr>
-          <tr><td><a href="../apidocs/org/apache/commons/math/ode/nonstiff/GraggBulirschStoerIntegrator.html">Gragg-Bulirsch-Stoer</a>
variable (up to 18 by default)</td><td>variable</td></tr>
+          <tr><td><a href="../apidocs/org/apache/commons/math/ode/nonstiff/GraggBulirschStoerIntegrator.html">Gragg-Bulirsch-Stoer</a></td><td>variable
(up to 18 by default)</td><td>variable</td></tr>
+          <tr><td><a href="../apidocs/org/apache/commons/math/ode/nonstiff/AdamsBashforthIntegrator.html">Adams-Bashforth</a></td><td>variable</td><td>variable</td></tr>
+          <tr><td><a href="../apidocs/org/apache/commons/math/ode/nonstiff/AdamsMoultonIntegrator.html">Adams-Moulton</a></td><td>variable</td><td>variable</td></tr>
           </table>
         </p>
       </subsection>



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