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diff --git a/src/main/java/org/apache/commons/math/analysis/UnivariateMatrixFunction.java b/src/main/java/org/apache/commons/math/analysis/UnivariateMatrixFunction.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.math.analysis;
+
+import org.apache.commons.math.FunctionEvaluationException;
+
+/**
+ * An interface representing a univariate matrix function.
+ *
+ * @version $Revision: 1073498 $ $Date: 2011-02-22 21:57:26 +0100 (mar. 22 févr. 2011) $
+ * @since 2.0
+ */
+public interface UnivariateMatrixFunction {
+
+    /**
+     * Compute the value for the function.
+     * @param x the point for which the function value should be computed
+     * @return the value
+     * @throws FunctionEvaluationException if the function evaluation fails
+     */
+    double[][] value(double x) throws FunctionEvaluationException;
+
+}