Check-in commons-math 3.6.1 am: 1354beaf45 am: 0018f64b87 am: b3715644fb am: 5484895ffd am: 029d049e49HEADandroid-14.0.0_r37android-14.0.0_r36android-14.0.0_r35android-14.0.0_r34android-14.0.0_r33android-14.0.0_r32android-14.0.0_r31android-14.0.0_r30android-14.0.0_r29mastermainandroid14-qpr2-s5-releaseandroid14-qpr2-s4-releaseandroid14-qpr2-s3-releaseandroid14-qpr2-s2-releaseandroid14-qpr2-s1-releaseandroid14-qpr2-release

Original change: https://android-review.googlesource.com/c/platform/external/apache-commons-math/+/2702413

Change-Id: I6451550459c6d42417e3214f1db820289d799bc7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/src/main/java/org/apache/commons/math3/optim/linear/PivotSelectionRule.java b/src/main/java/org/apache/commons/math3/optim/linear/PivotSelectionRule.java
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index 0000000..a2a2765
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+++ b/src/main/java/org/apache/commons/math3/optim/linear/PivotSelectionRule.java
@@ -0,0 +1,38 @@
+/*
+ * 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
+}