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 * 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 /*
19 * This is not the original file distributed by the Apache Software Foundation
20 * It has been modified by the Hipparchus project
21 */
22
23 package org.hipparchus.analysis.function;
24
25 import org.hipparchus.analysis.differentiation.Derivative;
26 import org.hipparchus.analysis.differentiation.UnivariateDifferentiableFunction;
27 import org.hipparchus.util.FastMath;
28
29 /**
30 * Power function.
31 *
32 */
33 public class Power implements UnivariateDifferentiableFunction {
34 /** Power. */
35 private final double p;
36
37 /** Simple constructor.
38 * @param p Power.
39 */
40 public Power(double p) {
41 this.p = p;
42 }
43
44 /** {@inheritDoc} */
45 @Override
46 public double value(double x) {
47 return FastMath.pow(x, p);
48 }
49
50 /** {@inheritDoc}
51 */
52 @Override
53 public <T extends Derivative<T>> T value(T t) {
54 return t.pow(p);
55 }
56
57 }