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Talk at IFORS 2026 in Vienna

Fri, 17 Jul 2026 00:00:00 +0000

Today, I had the great pleasure of presenting our work on "A Branch-and-Cut Approach for Decision-Dependent Robust Optimization Problems" at the IFORS 2026 conference in Vienna. I really enjoyed the discussions and the exchange of ideas (both research-related and not) that took place during the week.

Preprint Update!

Mon, 13 Jul 2026 00:00:00 +0000

We just updated the preprint to our paper on “Branch-and-Cut for Mixed-Integer Linear Decision-Dependent Robust Optimization” (joint work with Henri Lefebvre, Martin Schmidt and Johannes Thürauf). It is available right now and can be found here. The accompanying open-source implementations are available here.

Preprint Update

Fri, 03 Jul 2026 00:00:00 +0000

There is an updated version to our preprint “A Computational Study for Solving Decision-Dependent Robust Problems as Bilevel Optimization Problems” (joint work with Henri Lefebvre, Martin Schmidt and Johannes Thürauf). Now with more details on the impact of hedging costs on the solution of DDRO problems. You can find it here.

Talk at CIRM Workshop in Marseille

Wed, 18 Mar 2026 00:00:00 +0000

I just presented our work on “Branch-and-Cut for Mixed-Integer Linear Decision-Dependent Robust Optimization” (jointly with Henri Lefebvre, Martin Schmidt and Johannes Thürauf) at the CIRM workshop “Optimization at the second level” in Marseille. You find the preprint of our paper here.

New Preprint Available!

Thu, 05 Mar 2026 00:00:00 +0000

The preprint of our new paper “Branch-and-Cut for Mixed-Integer Linear Decision-Dependent Robust Optimization” (joint work with Henri Lefebvre, Martin Schmidt and Johannes Thürauf) is available right now and can be found here. The accompanying open-source implementations are available here.

Preprint Update

Thu, 19 Feb 2026 00:00:00 +0000

Our preprint “A Computational Study for Solving Decision-Dependent Robust Problems as Bilevel Optimization Problems” (joint work with Henri Lefebvre, Martin Schmidt and Johannes Thürauf) just got an update. You can find it here.

Talk at EUROYoung 2025

Sat, 18 Oct 2025 00:00:00 +0000

The EUROYoung 2025 in Naples was a blast! I had the pleasure of presenting our ongoing work on “A Branch-and-Cut Approach for Decision-Dependent Robust Optimization Problems”. Great discussions, inspiring talks, and wonderful people all around!

Talk at ALOP 2025

Thu, 25 Sep 2025 00:00:00 +0000

Today, I gave a talk about “A Branch-and-Cut Approach for Decision-Dependent Robust Optimization Problems” at the International Workshop on Algorithmic Optimization in Trier.

Talk at OR2025

Wed, 03 Sep 2025 00:00:00 +0000

I gave a talk today about “A Branch-and-Cut Approach for Decision-Dependent Robust Optimization Problems” at the OR2025 Conference in Bielefeld.

Preprint Update

Tue, 12 Aug 2025 00:00:00 +0000

There is a new version of our preprint on “Solving Decision-Dependent Robust Problems as Bilevel Optimization Problems” (joint work with Henri Lefebvre, Martin Schmidt and Johannes Thürauf). You can find it here. The accompanying open-source implementations are still available here.

Talk at EURO2025

Mon, 23 Jun 2025 00:00:00 +0000

Today, I gave a talk about “Solving Decision-Dependent Robust Problems as Bilevel Optimization Problems” at the EURO2025 Conference in Leeds.

New Preprint Available!

Wed, 19 Feb 2025 00:00:00 +0000

The preprint for our new paper “Solving Decision-Dependent Robust Problems as Bilevel Optimization Problems” (joint work with Henri Lefebvre, Martin Schmidt and Johannes Thürauf) can be found here. The accompanying open-source implementations are available here.

About

Mon, 01 Jan 0001 00:00:00 +0000

Contact

Trier University
Department of Mathematics
Universitätsring 15
54296 Trier
0651 / 201 - 3452
stevens@uni-trier.de

Education

Master of Science in Mathematics (2024)
Trier University, Germany
Bachelor of Science in Business Mathematics (2022)
Trier University, Germany

Short CV

Since 07/2025: Vice president of the SIAM Student Chapter at Trier University
Since 10/2024: PhD Student Mathematical Optimization at Trier University
Since 10/2024: Research and Teaching Assistant at Trier University, Department of Mathematics, working group “Nonlinear Optimization” (Prof. Dr. Martin Schmidt)
10/2024 - 12/2025: Member of the Steering Committee within the Research Training Group “Algorithmic Optimization” at Trier University
10/2024 - 12/2025: Associate Member of the Research Training Group “Algorithmic Optimization” at Trier University
09/2024: Master of Science in Mathematics, Trier University
09/2022: Bachelor of Science in Business Mathematics, Trier University
08/2015 - 09/2018: Banker at Kreissparkasse Rhein-Hunsrück

Publications

Mon, 01 Jan 0001 00:00:00 +0000

Submitted Works and Preprints

Branch-and-Cut for Mixed-Integer Linear Decision-Dependent Robust Optimization
Jointly with Henri Lefebvre, Martin Schmidt and Johannes Thürauf
Preprint (03/2026): Optimization Online
Accompanying open-source implementations: GitHub
A Computational Study for Solving Decision-Dependent Robust Problems as Bilevel Optimization Problems
Jointly with Henri Lefebvre, Martin Schmidt and Johannes Thürauf
Preprint (07/2026): Optimization Online
Accompanying open-source implementations: GitHub

Talks

Mon, 01 Jan 0001 00:00:00 +0000

Branch-and-Cut for Mixed-Integer Linear Decision-Dependent Robust Optimization
IFORS 2026 July 17, 2026, Vienna, Austria
Never Change a Winning Team - Unless It’s More Fun
Optimizing Tournament Narratives via Multi-Commodity Flow Models
SIAM Student Chapter
June 2, 2026, Trier University, Germany
Branch-and-Cut for Mixed-Integer Linear Decision-Dependent Robust Optimization
CIRM Workshop “Optimization at the second level”
March 18, 2026, Marseille, France
A Gentle and Incomplete Introduction to Branch and Cut with Intersection Cuts
SIAM Student Chapter
November 18, 2025, Trier University, Germany
A Branch-and-Cut Approach for Decision-Dependent Robust Optimization Problems
EUROYoung 2025
October 15, 2025, Naples, Italy
A Branch-and-Cut Approach for Decision-Dependent Robust Optimization Problems
International Workshop on Algorithmic Optimization
September 25, 2025, Trier, Germany
A Branch-and-Cut Approach for Decision-Dependent Robust Optimization Problems
OR2025 Conference
September 3, 2025, Bielefeld, Germany
Solving Decision-Dependent Robust Problems as Bilevel Optimization Problems
EURO2025 Conference
June 23, 2025, Leeds, UK

Teaching

Mon, 01 Jan 0001 00:00:00 +0000

Summer Term 2026

Nonlinear Optimization
Bilevel Optimization II

Winter Term 2025/26

Bilevel Optimization I

Summer Term 2025

Numerical Optimization
Nonlinear Optimization

Winter Term 2024/25

Linear Optimization