1 /*
2 * Licensed to the Hipparchus project 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 Hipparchus project 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 * https://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.hipparchus.ode.nonstiff;
19
20 /** This interface represents an integrator based on Butcher arrays.
21 * @see RungeKuttaIntegrator
22 * @see EmbeddedRungeKuttaIntegrator
23 */
24 public interface ButcherArrayProvider {
25
26 /** Get the time steps from Butcher array (without the first zero).
27 * @return time steps from Butcher array (without the first zero
28 */
29 double[] getC();
30
31 /** Get the internal weights from Butcher array (without the first empty row).
32 * @return internal weights from Butcher array (without the first empty row)
33 */
34 double[][] getA();
35
36 /** Get the external weights for the high order method from Butcher array.
37 * @return external weights for the high order method from Butcher array
38 */
39 double[] getB();
40
41 }