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Java example source code file (TestFieldProblem3.java)
The TestFieldProblem3.java Java example source code/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.commons.math3.ode; import org.apache.commons.math3.Field; import org.apache.commons.math3.RealFieldElement; import org.apache.commons.math3.util.MathArrays; /** * This class is used in the junit tests for the ODE integrators. * <p>This specific problem is the following differential equation : * <pre> * y1'' = -y1/r^3 y1 (0) = 1-e y1' (0) = 0 * y2'' = -y2/r^3 y2 (0) = 0 y2' (0) =sqrt((1+e)/(1-e)) * r = sqrt (y1^2 + y2^2), e = 0.9 * </pre> * This is a two-body problem in the plane which can be solved by * Kepler's equation * <pre> * y1 (t) = ... * </pre> * </p> * @param <T> the type of the field elements */ public class TestFieldProblem3<T extends RealFieldElement Other Java examples (source code examples)Here is a short list of links related to this Java TestFieldProblem3.java source code file: |
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