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    *      http://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  package org.apache.commons.math.ode;
19  
20  /**
21   * This class is used in the junit tests for the ODE integrators.
22   * <p>This is the same as problem 1 except integration is done
23   * backward in time</p>
24   */
25  public class TestProblem5
26    extends TestProblem1 {
27  
28    /** Serializable version identifier. */
29    private static final long serialVersionUID = 7579233102411804237L;
30  
31    /**
32     * Simple constructor.
33     */
34    public TestProblem5() {
35      super();
36      setFinalConditions(2 * t0 - t1);
37    }
38  
39    /** {@inheritDoc} */
40    public TestProblem5 copy() {
41      return new TestProblem5();
42    }
43  }