diff --git a/src/java/org/apache/commons/math/optimization/fitting/package.html b/src/java/org/apache/commons/math/optimization/fitting/package.html
index 12862ad10..9f9fa062d 100644
--- a/src/java/org/apache/commons/math/optimization/fitting/package.html
+++ b/src/java/org/apache/commons/math/optimization/fitting/package.html
@@ -19,25 +19,12 @@
 <body>
 This package provides classes to perform curve fitting.
 
-<p>Curve fitting is a special case of an {@link
-org.spaceroots.mantissa.estimation.EstimationProblem estimation problem}
+<p>Curve fitting is a special case of a least squares problem
 were the parameters are the coefficients of a function <code>f</code>
 whose graph <code>y=f(x)</code> should pass through sample points, and
-were the measurements are the ordinates of the curve
-<code>yi=f(xi)</code>.</p>
+were the objective function is the squared sum of residuals
+<code>f(x<sub>i</sub>)-y<sub>i</sub></code> for observed points
+(x<sub>i</sub>, y<sub>i</sub>).</p>
 
-<p>The organisation of this package is explained in the class diagram
-below. The {@link org.spaceroots.mantissa.fitting.AbstractCurveFitter
-AbstractCurveFitter} class is the base class for all curve fitting
-classes, it handles all common features like sample points
-handling. Each specific curve fitting class should sub-class this
-abstract class and implement the {@link
-org.spaceroots.mantissa.fitting.AbstractCurveFitter#valueAt valueAt} and
-{@link org.spaceroots.mantissa.fitting.AbstractCurveFitter#partial
-partial} methods.</p>
-
-<img src="doc-files/org_spaceroots_mantissa_fitting_classes.png" />
-
-@author L. Maisonobe
 </body>
 </html>
