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    1   /*
    2    * Copyright 2004 The Apache Software Foundation.
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    *      http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  package org.apache.commons.math.analysis;
    17
    18  /***
    19   * Extension of {@link UnivariateRealFunction} representing a differentiable univariate real function.
    20   *
    21   * @version $Revision: 1.2 $ $Date: 2004/06/23 16:26:14 $
    22   */
    23  public interface DifferentiableUnivariateRealFunction
    24      extends UnivariateRealFunction {
    25
    26      /***
    27       * Returns the derivative of the function
    28       *
    29       * @return  the derivative function
    30       */
    31      public UnivariateRealFunction derivative();
    32
    33  }