diff --git a/src/main/java/org/apache/commons/math4/analysis/FieldUnivariateFunction.java b/src/main/java/org/apache/commons/math4/analysis/RealFieldUnivariateFunction.java
similarity index 97%
rename from src/main/java/org/apache/commons/math4/analysis/FieldUnivariateFunction.java
rename to src/main/java/org/apache/commons/math4/analysis/RealFieldUnivariateFunction.java
index 4bd00ad82..28946509b 100644
--- a/src/main/java/org/apache/commons/math4/analysis/FieldUnivariateFunction.java
+++ b/src/main/java/org/apache/commons/math4/analysis/RealFieldUnivariateFunction.java
@@ -69,7 +69,7 @@ import org.apache.commons.math4.RealFieldElement;
  * @since 3.6
  * @see UnivariateFunction
  */
-public interface FieldUnivariateFunction<T extends RealFieldElement<T>> {
+public interface RealFieldUnivariateFunction<T extends RealFieldElement<T>> {
     /**
      * Compute the value of the function.
      *
diff --git a/src/main/java/org/apache/commons/math4/analysis/solvers/FieldBracketingNthOrderBrentSolver.java b/src/main/java/org/apache/commons/math4/analysis/solvers/FieldBracketingNthOrderBrentSolver.java
index 8b52b1854..5a65ee2d7 100644
--- a/src/main/java/org/apache/commons/math4/analysis/solvers/FieldBracketingNthOrderBrentSolver.java
+++ b/src/main/java/org/apache/commons/math4/analysis/solvers/FieldBracketingNthOrderBrentSolver.java
@@ -19,7 +19,7 @@ package org.apache.commons.math4.analysis.solvers;
 
 import org.apache.commons.math4.Field;
 import org.apache.commons.math4.RealFieldElement;
-import org.apache.commons.math4.analysis.FieldUnivariateFunction;
+import org.apache.commons.math4.analysis.RealFieldUnivariateFunction;
 import org.apache.commons.math4.exception.MathInternalError;
 import org.apache.commons.math4.exception.NoBracketingException;
 import org.apache.commons.math4.exception.NullArgumentException;
@@ -162,7 +162,7 @@ public class FieldBracketingNthOrderBrentSolver<T extends RealFieldElement<T>> {
      * @exception NullArgumentException if f is null.
      * @exception NoBracketingException if root cannot be bracketed
      */
-    public T solve(final int maxEval, final FieldUnivariateFunction<T> f,
+    public T solve(final int maxEval, final RealFieldUnivariateFunction<T> f,
                    final T min, final T max, final AllowedSolution allowedSolution)
         throws NullArgumentException, NoBracketingException {
         return solve(maxEval, f, min, max, min.add(max).divide(2), allowedSolution);
@@ -185,7 +185,7 @@ public class FieldBracketingNthOrderBrentSolver<T extends RealFieldElement<T>> {
      * @exception NullArgumentException if f is null.
      * @exception NoBracketingException if root cannot be bracketed
      */
-    public T solve(final int maxEval, final FieldUnivariateFunction<T> f,
+    public T solve(final int maxEval, final RealFieldUnivariateFunction<T> f,
                    final T min, final T max, final T startValue,
                    final AllowedSolution allowedSolution)
         throws NullArgumentException, NoBracketingException {
diff --git a/src/test/java/org/apache/commons/math4/analysis/solvers/FieldBracketingNthOrderBrentSolverTest.java b/src/test/java/org/apache/commons/math4/analysis/solvers/FieldBracketingNthOrderBrentSolverTest.java
index dea49cc02..a1d5587f7 100644
--- a/src/test/java/org/apache/commons/math4/analysis/solvers/FieldBracketingNthOrderBrentSolverTest.java
+++ b/src/test/java/org/apache/commons/math4/analysis/solvers/FieldBracketingNthOrderBrentSolverTest.java
@@ -17,7 +17,7 @@
 
 package org.apache.commons.math4.analysis.solvers;
 
-import org.apache.commons.math4.analysis.FieldUnivariateFunction;
+import org.apache.commons.math4.analysis.RealFieldUnivariateFunction;
 import org.apache.commons.math4.analysis.solvers.AllowedSolution;
 import org.apache.commons.math4.dfp.Dfp;
 import org.apache.commons.math4.dfp.DfpField;
@@ -53,7 +53,7 @@ public final class FieldBracketingNthOrderBrentSolverTest {
         FieldBracketingNthOrderBrentSolver<Dfp> solver =
                 new FieldBracketingNthOrderBrentSolver<Dfp>(relativeAccuracy, absoluteAccuracy,
                                                             field.newDfp(1.0e-20), 20);
-        FieldUnivariateFunction<Dfp> f = new FieldUnivariateFunction<Dfp>() {
+        RealFieldUnivariateFunction<Dfp> f = new RealFieldUnivariateFunction<Dfp>() {
             public Dfp value(Dfp x) {
                 Dfp one     = field.getOne();
                 Dfp oneHalf = one.divide(2);
@@ -85,37 +85,37 @@ public final class FieldBracketingNthOrderBrentSolverTest {
         // intern J. Computer Math Vol 23 pp 265-282
         // available here: http://www.math.nps.navy.mil/~bneta/SeveralNewMethods.PDF
         for (AllowedSolution allowed : AllowedSolution.values()) {
-            check(new FieldUnivariateFunction<Dfp>() {
+            check(new RealFieldUnivariateFunction<Dfp>() {
                 public Dfp value(Dfp x) {
                     return DfpMath.sin(x).subtract(x.divide(2));
                 }
             }, 200, -2.0, 2.0, allowed);
 
-            check(new FieldUnivariateFunction<Dfp>() {
+            check(new RealFieldUnivariateFunction<Dfp>() {
                 public Dfp value(Dfp x) {
                     return DfpMath.pow(x, 5).add(x).subtract(field.newDfp(10000));
                 }
             }, 200, -5.0, 10.0, allowed);
 
-            check(new FieldUnivariateFunction<Dfp>() {
+            check(new RealFieldUnivariateFunction<Dfp>() {
                 public Dfp value(Dfp x) {
                     return x.sqrt().subtract(field.getOne().divide(x)).subtract(field.newDfp(3));
                 }
             }, 200, 0.001, 10.0, allowed);
 
-            check(new FieldUnivariateFunction<Dfp>() {
+            check(new RealFieldUnivariateFunction<Dfp>() {
                 public Dfp value(Dfp x) {
                     return DfpMath.exp(x).add(x).subtract(field.newDfp(20));
                 }
             }, 200, -5.0, 5.0, allowed);
 
-            check(new FieldUnivariateFunction<Dfp>() {
+            check(new RealFieldUnivariateFunction<Dfp>() {
                 public Dfp value(Dfp x) {
                     return DfpMath.log(x).add(x.sqrt()).subtract(field.newDfp(5));
                 }
             }, 200, 0.001, 10.0, allowed);
 
-            check(new FieldUnivariateFunction<Dfp>() {
+            check(new RealFieldUnivariateFunction<Dfp>() {
                 public Dfp value(Dfp x) {
                     return x.subtract(field.getOne()).multiply(x).multiply(x).subtract(field.getOne());
                 }
@@ -124,7 +124,7 @@ public final class FieldBracketingNthOrderBrentSolverTest {
 
     }
 
-    private void check(FieldUnivariateFunction<Dfp> f, int maxEval, double min, double max,
+    private void check(RealFieldUnivariateFunction<Dfp> f, int maxEval, double min, double max,
                        AllowedSolution allowedSolution) {
         FieldBracketingNthOrderBrentSolver<Dfp> solver =
                 new FieldBracketingNthOrderBrentSolver<Dfp>(relativeAccuracy, absoluteAccuracy,