--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/math/fitting/InvSQPow.java	Mon Dec 02 14:07:25 2019 +0100
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/math/fitting/InvSQPow.java	Mon Dec 02 14:14:06 2019 +0100
@@ -8,24 +8,19 @@
 
 package org.dive4elements.river.artifacts.math.fitting;
 
-public class InvSQPow
-extends      Function
-{
-    public static final Derivative DERIVATIVE =
-        new Derivative("Q'(S) = (S/a)^(1/b)/(b*S)") {
+public class InvSQPow extends Function {
+    public static final Derivative DERIVATIVE = new Derivative("Q'(S) = (S/a)^(1/b)/(b*S)") {
 
         @Override
-        public org.dive4elements.river.artifacts.math.Function
-            instantiate(double [] parameters)
-        {
-            final double _1a = 1d/parameters[0];
-            final double   b = parameters[1];
-            final double _1b = 1d/b;
+        public org.dive4elements.river.artifacts.math.Function instantiate(final double[] parameters) {
+            final double _1a = 1d / parameters[0];
+            final double b = parameters[1];
+            final double _1b = 1d / b;
 
             return new org.dive4elements.river.artifacts.math.Function() {
                 @Override
-                public double value(double S) {
-                    return Math.pow(S*_1a, _1b)/(b*S);
+                public double value(final double S) {
+                    return Math.pow(S * _1a, _1b) / (b * S);
                 }
             };
         }
@@ -33,30 +28,24 @@
     public static final Function INSTANCE = new InvSQPow();
 
     public InvSQPow() {
-        super(
-            "inv-sq-pow",
-            "Q(S) = Q=(S/a)^(1/b)",
-            new String [] { "a", "b" });
+        super("inv-special", "Q(S) = Q=(S/a)^(1/b)", new String[] { "a", "b" });
     }
 
     @Override
-    public double value(double S, double [] parameters) {
-        double a = parameters[0];
-        double b = parameters[1];
-        return Math.pow(S/a, 1d/b);
+    public double value(final double S, final double[] parameters) {
+        final double a = parameters[0];
+        final double b = parameters[1];
+        return Math.pow(S / a, 1d / b);
     }
 
     @Override
-    public double [] gradient(double S, double [] parameters) {
-        double a     = parameters[0];
-        double b     = parameters[1];
-        double Sa    = S/a;
-        double _1b   = 1d/b;
-        double eSa1b = Math.pow(Sa, _1b);
-        return new double [] {
-            -eSa1b/(a*b),
-            -(eSa1b*Math.log(Sa))/(b*b)
-        };
+    public double[] gradient(final double S, final double[] parameters) {
+        final double a = parameters[0];
+        final double b = parameters[1];
+        final double Sa = S / a;
+        final double _1b = 1d / b;
+        final double eSa1b = Math.pow(Sa, _1b);
+        return new double[] { -eSa1b / (a * b), -(eSa1b * Math.log(Sa)) / (b * b) };
     }
 
     @Override