From cde43197f980538e411d851735ac7a63ddd613e1 Mon Sep 17 00:00:00 2001
From: Thomas Neidhart <thomas.neidhart@gmail.com>
Date: Mon, 6 Oct 2014 22:50:20 +0200
Subject: [PATCH] Use MathUtils.PI_SQUARED.

---
 .../apache/commons/math3/distribution/GumbelDistribution.java  | 3 ++-
 .../commons/math3/distribution/LogisticDistribution.java       | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/main/java/org/apache/commons/math3/distribution/GumbelDistribution.java b/src/main/java/org/apache/commons/math3/distribution/GumbelDistribution.java
index ae4d84296..f42a1e863 100644
--- a/src/main/java/org/apache/commons/math3/distribution/GumbelDistribution.java
+++ b/src/main/java/org/apache/commons/math3/distribution/GumbelDistribution.java
@@ -22,6 +22,7 @@ import org.apache.commons.math3.exception.util.LocalizedFormats;
 import org.apache.commons.math3.random.RandomGenerator;
 import org.apache.commons.math3.random.Well19937c;
 import org.apache.commons.math3.util.FastMath;
+import org.apache.commons.math3.util.MathUtils;
 
 /**
  * This class implements the Gumbel distribution.
@@ -127,7 +128,7 @@ public class GumbelDistribution extends AbstractRealDistribution {
 
     /** {@inheritDoc} */
     public double getNumericalVariance() {
-        return (FastMath.PI * FastMath.PI) / 6.0 * (beta * beta);
+        return (MathUtils.PI_SQUARED) / 6.0 * (beta * beta);
     }
 
     /** {@inheritDoc} */
diff --git a/src/main/java/org/apache/commons/math3/distribution/LogisticDistribution.java b/src/main/java/org/apache/commons/math3/distribution/LogisticDistribution.java
index 402b582f0..7305594eb 100644
--- a/src/main/java/org/apache/commons/math3/distribution/LogisticDistribution.java
+++ b/src/main/java/org/apache/commons/math3/distribution/LogisticDistribution.java
@@ -22,6 +22,7 @@ import org.apache.commons.math3.exception.util.LocalizedFormats;
 import org.apache.commons.math3.random.RandomGenerator;
 import org.apache.commons.math3.random.Well19937c;
 import org.apache.commons.math3.util.FastMath;
+import org.apache.commons.math3.util.MathUtils;
 
 /**
  * This class implements the Logistic distribution.
@@ -121,7 +122,7 @@ public class LogisticDistribution extends AbstractRealDistribution {
 
     /** {@inheritDoc} */
     public double getNumericalVariance() {
-        return (FastMath.PI * FastMath.PI / 3.0) * (1.0 / (s * s));
+        return (MathUtils.PI_SQUARED / 3.0) * (1.0 / (s * s));
     }
 
     /** {@inheritDoc} */