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.math.ode;
019    
020    /**
021     * This class is used in the junit tests for the ODE integrators.
022     * <p>This is the same as problem 1 except integration is done
023     * backward in time</p>
024     */
025    public class TestProblem5
026      extends TestProblem1 {
027    
028      /** Serializable version identifier. */
029      private static final long serialVersionUID = 7579233102411804237L;
030    
031      /**
032       * Simple constructor.
033       */
034      public TestProblem5() {
035        super();
036        setFinalConditions(2 * t0 - t1);
037      }
038    
039      /** {@inheritDoc} */
040      public TestProblem5 copy() {
041        return new TestProblem5();
042      }
043    }