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diff --git a/src/main/java/org/apache/commons/math3/analysis/MultivariateFunction.java b/src/main/java/org/apache/commons/math3/analysis/MultivariateFunction.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.math3.analysis;
+
+/**
+ * An interface representing a multivariate real function.
+ *
+ * @since 2.0
+ */
+public interface MultivariateFunction {
+
+    /**
+     * Compute the value for the function at the given point.
+     *
+     * @param point Point at which the function must be evaluated.
+     * @return the function value for the given point.
+     * @throws org.apache.commons.math3.exception.DimensionMismatchException if the parameter's
+     *     dimension is wrong for the function being evaluated.
+     * @throws org.apache.commons.math3.exception.MathIllegalArgumentException when the activated
+     *     method itself can ascertain that preconditions, specified in the API expressed at the
+     *     level of the activated method, have been violated. In the vast majority of cases where
+     *     Commons Math throws this exception, it is the result of argument checking of actual
+     *     parameters immediately passed to a method.
+     */
+    double value(double[] point);
+}