opti-extensions: A collection of custom data structures and
user-friendly functions for mathematical optimization modeling with
docplex, gurobipy, and xpress.

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Some of the model-specific functionality and variable functionality in
this software is derived from software developed by IBM Corporation.

   IBM® Decision Optimization CPLEX® Modeling for Python (DOcplex)
   https://www.ibm.com/products/ilog-cplex-optimization-studio
   https://github.com/IBMDecisionOptimization/docplex/

   Copyright 2015 IBM Corporation

   Licensed 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.

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Some of the variable functionality in this software is derived from software
developed by Fair Isaac Corporation.

   Xpress Solver Python API (xpress)
   https://www.fico.com/en/products/fico-xpress-optimization
   https://www.fico.com/fico-xpress-optimization/docs/latest/solver/optimizer/python/HTML

   Copyright 2001-2025 Fair Isaac Corporation

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Some of the variable functionality in this software is derived from software
developed by Gurobi Optimization, LLC.

   Gurobi Optimizer Python API (gurobipy)
   https://www.gurobi.com/
   https://docs.gurobi.com/projects/optimizer/en/current/reference/python.html

   Copyright 2025 Gurobi Optimization, LLC

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The examples and functional tests used in this software are derived from
software developed by AMPL Optimization Inc.

   AMPL Model Colaboratory
   https://github.com/ampl/colab.ampl.com/

   MIT License

   Copyright (c) 2022-2022, AMPL Optimization inc.
   All rights reserved.

   Permission is hereby granted, free of charge, to any person obtaining a copy
   of this software and associated documentation files (the "Software"), to deal
   in the Software without restriction, including without limitation the rights
   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   copies of the Software, and to permit persons to whom the Software is
   furnished to do so, subject to the following conditions:

   The above copyright notice and this permission notice shall be included in all
   copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   SOFTWARE.

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