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With inspiration from other libraries
/*
* 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.optim.linear;
import org.apache.commons.math3.optim.OptimizationData;
/**
* Pivot selection rule to the use for a Simplex solver.
*
* @since 3.3
*/
public enum PivotSelectionRule implements OptimizationData {
/**
* The classical rule, the variable with the most negative coefficient
* in the objective function row will be chosen as entering variable.
*/
DANTZIG,
/**
* The first variable with a negative coefficient in the objective function
* row will be chosen as entering variable. This rule guarantees to prevent
* cycles, but may take longer to find an optimal solution.
*/
BLAND
}