From: Ralf Hartmann <Ralf.Hartmann@dlr.de>
Date: Tue, 15 May 2001 16:23:10 +0000 (+0000)
Subject: New AutoDerivativeFunction class.
X-Git-Tag: v8.0.0~19179
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=87a4bd2acf7d32df4f305f91ce93bf1861e6c714;p=dealii.git

New AutoDerivativeFunction class.


git-svn-id: https://svn.dealii.org/trunk@4612 0785d39b-7218-0410-832d-ea1e28bc413d
---

diff --git a/deal.II/doc/news/2001/c-3-1.html b/deal.II/doc/news/2001/c-3-1.html
index 18d3cbc4b4..4c263461c6 100644
--- a/deal.II/doc/news/2001/c-3-1.html
+++ b/deal.II/doc/news/2001/c-3-1.html
@@ -125,9 +125,25 @@ documentation, etc</a>.
 <h3>base</h3>
 
 <ol>
+  <li> <p>
+       New: There is now a new <code
+       class="class">AutoDerivativeFunction</code> class that
+       automatically computes the gradient of a function by employing
+       numerical difference quotients. This only, if the user function
+       does not provide the gradient function himself. This class can
+       replace the <code class="class">Function</code> class as base
+       class for user defined <code class="class">Function</code>
+       classes.
+       <br>
+       This new class can be used if the user only implements the
+       <code class="member">value</code> function but wants to call
+       also the <code class="member">gradient</code> functions.
+       <br>
+       (RH 2001/05/15)
+
   <li> <p>
        New: The <code class="class">Quadrature</code> class now has a
-       conctructor that only accepts quadrature points and sets the
+       constructor that only accepts quadrature points and sets the
        weights to invalid values.
        <br>
        (GK 2001/04/26)