001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    
018    package org.apache.commons.math3.analysis.differentiation;
019    
020    import org.apache.commons.math3.analysis.MultivariateFunction;
021    import org.apache.commons.math3.exception.MathIllegalArgumentException;
022    
023    /**
024     * Extension of {@link MultivariateFunction} representing a
025     * multivariate differentiable real function.
026     * @version $Id: MultivariateDifferentiableFunction.java 1416643 2012-12-03 19:37:14Z tn $
027     * @since 3.1
028     */
029    public interface MultivariateDifferentiableFunction extends MultivariateFunction {
030    
031        /**
032         * Compute the value for the function at the given point.
033         *
034         * @param point Point at which the function must be evaluated.
035         * @return the function value for the given point.
036         * @exception MathIllegalArgumentException if {@code point} does not
037         * fulfill functions constraints (wrong dimension, argument out of bound,
038         * or unsupported derivative order for example)
039         */
040        DerivativeStructure value(DerivativeStructure[] point)
041            throws MathIllegalArgumentException;
042    
043    }