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The Apache Commons Math project is a library of lightweight, self-contained mathematics and statistics components addressing the most common practical problems not immediately available in the Java programming language or commons-lang.
/*
* 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.linear;
import org.apache.commons.math3.exception.MathIllegalArgumentException;
import org.apache.commons.math3.exception.util.LocalizedFormats;
/**
* Exception to be thrown when a symmetric, definite positive
* {@link RealLinearOperator} is expected.
* Since the coefficients of the matrix are not accessible, the most
* general definition is used to check that {@code A} is not positive
* definite, i.e. there exists {@code x} such that {@code x' A x <= 0}.
* In the terminology of this exception, {@code A} is the "offending"
* linear operator and {@code x} the "offending" vector.
*
* @since 3.0
*/
public class NonPositiveDefiniteOperatorException
extends MathIllegalArgumentException {
/** Serializable version Id. */
private static final long serialVersionUID = 917034489420549847L;
/** Creates a new instance of this class. */
public NonPositiveDefiniteOperatorException() {
super(LocalizedFormats.NON_POSITIVE_DEFINITE_OPERATOR);
}
}