diff --git a/src/main/java/org/apache/commons/math3/analysis/differentiation/SparseGradient.java b/src/main/java/org/apache/commons/math3/analysis/differentiation/SparseGradient.java
index 645884aad..ccffe46ab 100644
--- a/src/main/java/org/apache/commons/math3/analysis/differentiation/SparseGradient.java
+++ b/src/main/java/org/apache/commons/math3/analysis/differentiation/SparseGradient.java
@@ -235,7 +235,7 @@ public class SparseGradient implements RealFieldElement<SparseGradient>, Seriali
      * </p>
      * @param a instance to multiply
      */
-    public void multInPlace(final SparseGradient a) {
+    public void multiplyInPlace(final SparseGradient a) {
         // Derivatives.
         for (Map.Entry<Integer, Double> entry : derivatives.entrySet()) {
             derivatives.put(entry.getKey(), a.value * entry.getValue());
@@ -872,7 +872,7 @@ public class SparseGradient implements RealFieldElement<SparseGradient>, Seriali
      */
     @Override
     public int hashCode() {
-        return 743 + 809 *  + 233 * MathUtils.hash(value) + 167 * derivatives.hashCode();
+        return 743 + 809 * MathUtils.hash(value) + 167 * derivatives.hashCode();
     }
 
 }
diff --git a/src/test/java/org/apache/commons/math3/analysis/differentiation/SparseGradientTest.java b/src/test/java/org/apache/commons/math3/analysis/differentiation/SparseGradientTest.java
index 8fa168330..559da879f 100644
--- a/src/test/java/org/apache/commons/math3/analysis/differentiation/SparseGradientTest.java
+++ b/src/test/java/org/apache/commons/math3/analysis/differentiation/SparseGradientTest.java
@@ -126,7 +126,7 @@ public class SparseGradientTest extends ExtendedFieldElementAbstractTest<SparseG
         final SparseGradient var1 = SparseGradient.createVariable(id1, v1);
         final SparseGradient sum = var1.multiply(c1);
         final SparseGradient mult = SparseGradient.createVariable(id2, v2);
-        mult.multInPlace(var1);
+        mult.multiplyInPlace(var1);
         sum.addInPlace(mult);
         Assert.assertEquals(v1 * c1 + v2 * v1, sum.getValue(), 1.0e-15); // returns the value
         Assert.assertEquals(2, sum.numVars());