PWL-T-Rex 🦖

The Piecewise Linear Reformulation Tool for Relaxations (PWL-T-Rex) implements and compares different Mixed Integer Programming (MIP) representation methods for reformulating Mixed-Integer Nonlinear Programs. You can find the Open Source Code on GitHub.

This framework arised during the work on the following paper:

Braun, K., & Burlacu, R. (2025). Benchmarking Piecewise Linear Reformulations for MINLPs: A Computational Study Based on the Open-Source Framework PWL-T-Rex. Optimization Online. Retrieved from https://optimization-online.org/2023/09/a-computational-study-for-piecewise-linear-relaxations-of-mixed-integer-nonlinear-programs/

So, if you use PWL-T-Rex in your research, please cite (when using BibTeX):

@article{braun2025computational,
    title={Benchmarking Piecewise Linear Reformulations for MINLPs: A Computational Study Based on the Open-Source Framework PWL-T-Rex},
    author={Braun, Kristin and Burlacu, Robert},
    journal={Optimization Online},
    year={2025},
    url={https://optimization-online.org/2023/09/a-computational-study-for-piecewise-linear-relaxations-of-mixed-integer-nonlinear-programs/}
}