Check-in commons-math 3.6.1

This includes many changes over the original version and is
also incompatible, which is why the existing commons-math library
is left untouched.

Test: N/A
Change-Id: Icd0f3069a3c62b2572f2263732d91e6c3b6e8cba

1 files changed, 51 insertions, 0 deletions

diff --git a/src/main/java/org/apache/commons/math3/optimization/MultivariateDifferentiableMultiStartOptimizer.java b/src/main/java/org/apache/commons/math3/optimization/MultivariateDifferentiableMultiStartOptimizer.java
new file mode 100644
index 0000000..e883805
--- /dev/null
+++ b/src/main/java/org/apache/commons/math3/optimization/MultivariateDifferentiableMultiStartOptimizer.java
@@ -0,0 +1,51 @@
+/*
+ * 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.optimization;
+
+import org.apache.commons.math3.analysis.differentiation.MultivariateDifferentiableFunction;
+import org.apache.commons.math3.random.RandomVectorGenerator;
+
+/**
+ * Special implementation of the {@link MultivariateDifferentiableOptimizer} interface adding
+ * multi-start features to an existing optimizer.
+ *
+ * <p>This class wraps a classical optimizer to use it several times in turn with different starting
+ * points in order to avoid being trapped into a local extremum when looking for a global one.
+ *
+ * @deprecated As of 3.1 (to be removed in 4.0).
+ * @since 3.1
+ */
+@Deprecated
+public class MultivariateDifferentiableMultiStartOptimizer
+        extends BaseMultivariateMultiStartOptimizer<MultivariateDifferentiableFunction>
+        implements MultivariateDifferentiableOptimizer {
+    /**
+     * Create a multi-start optimizer from a single-start optimizer.
+     *
+     * @param optimizer Single-start optimizer to wrap.
+     * @param starts Number of starts to perform (including the first one), multi-start is disabled
+     *     if value is less than or equal to 1.
+     * @param generator Random vector generator to use for restarts.
+     */
+    public MultivariateDifferentiableMultiStartOptimizer(
+            final MultivariateDifferentiableOptimizer optimizer,
+            final int starts,
+            final RandomVectorGenerator generator) {
+        super(optimizer, starts, generator);
+    }
+}