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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      https://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  /*
19   * This is not the original file distributed by the Apache Software Foundation
20   * It has been modified by the Hipparchus project
21   */
22  
23  package org.hipparchus.analysis.differentiation;
24  
25  import org.hipparchus.analysis.MultivariateFunction;
26  import org.hipparchus.exception.MathIllegalArgumentException;
27  
28  /**
29   * Extension of {@link MultivariateFunction} representing a
30   * multivariate differentiable real function.
31   */
32  public interface MultivariateDifferentiableFunction extends MultivariateFunction {
33  
34      /**
35       * Compute the value for the function at the given point.
36       *
37       * @param point Point at which the function must be evaluated.
38       * @return the function value for the given point.
39       * @exception MathIllegalArgumentException if {@code point} does not
40       * satisfy the function's constraints (wrong dimension, argument out of bound,
41       * or unsupported derivative order for example)
42       */
43      DerivativeStructure value(DerivativeStructure[] point)
44          throws MathIllegalArgumentException;
45  
46  }