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/*
* 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.nonstiff;
import org.apache.commons.math3.RealFieldElement;
/** This interface represents an integrator based on Butcher arrays.
* @see RungeKuttaFieldIntegrator
* @see EmbeddedRungeKuttaFieldIntegrator
* @param <T> the type of the field elements
* @since 3.6
*/
public interface FieldButcherArrayProvider<T extends RealFieldElement<T>> {
/** Get the time steps from Butcher array (without the first zero).
* @return time steps from Butcher array (without the first zero
*/
T[] getC();
/** Get the internal weights from Butcher array (without the first empty row).
* @return internal weights from Butcher array (without the first empty row)
*/
T[][] getA();
/** Get the external weights for the high order method from Butcher array.
* @return external weights for the high order method from Butcher array
*/
T[] getB();
}
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