<h3>deal.II</h3>
<ol>
+ <li> <p>
+ Extended: <code
+ class="class">DerivativeApproximation</code> now offers access to the
+ full tensor of derivatives of orders one, two and three. This
+ information can be requested for a single cell by means of the <code
+ class="class">DerivativeApproximation</code><code
+ class="member">::approximate_derivative_tensor</code> function. If the
+ norm of this tensor is required later on, the new <code
+ class="class">DerivativeApproximation</code><code
+ class="member">::derivative_norm</code> function can be used. Note, that
+ for second order derivatives, this returns the largest eigenvalue
+ instead of the Frobenius norm, which is returned by the <code
+ class="class">Tensor<rank_,dim></code><code
+ class="member">::norm</code> function.
+ <br>
+ (Tobias Leicht 2006/08/03)
+ </p>
+
+ <li> <p>
+ Fixed: <code
+ class="class">DerivativeApproximation</code> offers approximated
+ derivatives of a discrete function. The symmetrization of the derivative
+ tensor is now done at the right place, i.e. the derivative itself is
+ symmetrized instead of an intermediate tensor. This should improve the
+ results slightly, but cause no problems otherwise, as this is completely
+ internal to the class.
+ <br>
+ (Tobias Leicht 2006/08/03)
+ </p>
+
<li> <p>
Fixed: The <code
class="member">DataOut::build_patches</code> and similar