Current members of our group in Düsseldorf:
Professor Dr. Jörg Rothe, since October 2000 a member (and the founder) of our group.
Promotion, summa cum laude, Friedrich-Schiller-Universität Jena, October 1995.
Dissertation: "On Some Promise Classes in Structural Complexity Theory."
PhD Advisor: Prof. Dr. Gerd Wechsung.
Habilitation, Friedrich-Schiller-Universität Jena, June 1999.
Habilitationsschrift: "Complexity of Certificates, Heuristics, and Counting Types, with Applications to Cryptography and Circuit Theory."
Publications: sorted by type of publication | sorted by year.
Dr. Joanna Kaczmarek, Postdoc, since October 2020 a member of our group.
Promotion, summa cum laude, Heinrich-Heine-Universität Düsseldorf, July 2025.
Dissertation: "Computational Analysis of Electoral Control in Single- and Multiwinner Elections."
PhD Advisor: Prof. Dr. Jörg Rothe.
Publications: sorted by type of publication | sorted by year.
Tessa Lina Seeger, PhD student, since June 2021 a member of our group.
PhD Advisor: Prof. Dr. Jörg Rothe.
Publications: sorted by type of publication | sorted by year.
Paul Nüsken, PhD student, since January 2023 a member of our group.
PhD Advisor: Prof. Dr. Jörg Rothe.
Publications: sorted by type of publication | sorted by year.
Katharina Volz, PhD student, since July 2026 a member of our group.
PhD Advisor: Prof. Dr. Jörg Rothe.
Publications: sorted by type of publication | sorted by year.
Yanfei Wang, PhD student, since July 2026 a member of our group.
PhD Advisor: Prof. Dr. Jörg Rothe.
Publications: sorted by type of publication | sorted by year.

Former members of our group in Düsseldorf:
Dr. Roman Zorn, from February 2022 through June 2025 a member of our group.
Promotion, magna cum laude, Heinrich-Heine-Universität Düsseldorf, December 2025.
Dissertation: "Computational Analysis of Electoral Control in Single- and Multiwinner Elections."
PhD Advisor: Prof. Dr. Jörg Rothe.
Publications: sorted by type of publication | sorted by year.
Dr. Christian Laußmann, from May 2021 through November 2023 a member of our group.
Promotion, magna cum laude, Heinrich-Heine-Universität Düsseldorf, July 2023.
Dissertation: "COMSOC Methods in Real-World Applications."
PhD Advisor: Prof. Dr. Jörg Rothe.
Publications: sorted by type of publication | sorted by year.
Dr. Anna Maria Kerkmann, postdoc, from April 2019 through May 2023 a member of our group.
Promotion, summa cum laude, Heinrich-Heine-Universität Düsseldorf, September 2022.
Dissertation: "An Axiomatic and Computational Analysis of Altruism, Fairness, and Stability in Coalition Formation Games."
Best Dissertation 2022 Award of the Math.-Nat. Faculty of Heinrich-Heine-Universität Düsseldorf.
PhD Advisor: Prof. Dr. Jörg Rothe.
Publications: sorted by type of publication | h sorted by year.
Dr. Tobias Hogrebe, through August 2018 through February 2023 a member of our group.
Promotion, summa cum laude, Heinrich-Heine-Universität Düsseldorf, April 2021.
Dissertation: "From Elections to Tournaments: A Study of the Computational Complexity of Bribery, Design, and Prediction Problems in Voting and Sports."
PhD Advisor: Junior-Prof. Dr. Dorothea Baumeister.
Publications: sorted by type of publication | sorted by year.
Prof. Dr. Dorothea Baumeister, from October 2007 through January 2023 a member of our group; assistant professor from September 2013 through January 2023.
Promotion, summa cum laude, Heinrich-Heine-Universität Düsseldorf, September 2012.
Dissertation: "Computational Complexity in Three Areas of Computational Social Choice: Possible Winners, Unidirectional Covering Sets, and Judgment Aggregation."
PhD Advisor: Prof. Dr. Jörg Rothe.
Currently, she is a professor at Federal University of Applied Administrative Science in Brühl, Germany.
Publications: sorted by type of publication | sorted by year.
Dr. Linus Boes, from March 2019 through January 2023 a member of our group.
Promotion, magna cum laude,
Dissertation: "From Individual to Collective: Exploring Multiwinner Elections, Participatory Budgeting, and Judgment Aggregation on a Local and Global Level."
PhD Advisor: Junior-Prof. Dr. Dorothea Baumeister.
Publications: sorted by type of publication | sorted by year.
Lisa Rey, from October 2014 through May 2022 a member of our group.
PhD Advisor: Junior-Prof. Dr. Dorothea Baumeister.
Publications: sorted by type of publication | sorted by year.
Dr. Robin Weishaupt, from October 2019 through April 2022 a member of our group.
Promotion, magna cum laude, Heinrich-Heine-Universität Düsseldorf, May 2022.
Dissertation: "Deciding the Uncertain: Axiomatic Aspects of Fair Division and Computational Complexity Studies in Computational Social Choice and Graph Theory."
PhD Advisor: Prof. Dr. Jörg Rothe.
Publications: sorted by type of publication | sorted by year.
Dr. Marc Neveling, from February 2017 through January 2022 a member of our group.
Promotion, magna cum laude, Heinrich-Heine-Universität Düsseldorf, September 2021.
Dissertation: "A Computational Complexity Study of Various Types of Electoral Control, Cloning, and Bribery."
PhD Advisor: Prof. Dr. Jörg Rothe.
Publications: sorted by type of publication | sorted by year.
Dr. Cynthia Maushagen, postdoc, from February 2017 through May 2021 a member of our group.
Promotion, magna cum laude, Heinrich-Heine-Universität Düsseldorf, April 2021.
Dissertation: "Wahlbetrug mit festen und variablen Präferenzen: Eine Komplexitätsanalyse von Kontroll- und Bestechungsproblemen."
PhD Advisor: Prof. Dr. Jörg Rothe.
Publications: sorted by type of publication | sorted by year.
Dr. Ann-Kathrin Selker, from October 2014 through May 2021 a member of our group.
Promotion, magna cum laude, Heinrich-Heine-Universität Düsseldorf, December 2021.
Dissertation: "Voting and Judgment Aggregation: An Axiomatic and Algorithmic Analysis."
PhD Advisor: Junior-Prof. Dr. Dorothea Baumeister.
Publications: sorted by type of publication | sorted by year.
Dr. Daniel Neugebauer, from December 2014 through December 2020 a member of our group.
Promotion, magna cum laude, Heinrich-Heine-Universität Düsseldorf, July 2019.
Dissertation: "Bridging the Gap between Online Discussions and Formal Models of Argumentation."
PhD Advisor: Prof. Dr. Jörg Rothe.
Publications: sorted by type of publication | sorted by year.
Dr. Hilmar Schadrack, from November 2013 through December 2018 a member of our group.
Promotion, magna cum laude, Heinrich-Heine-Universität Düsseldorf, June 2018.
Dissertation: "A User's Theory - How to Model Agents of Online Debates."
PhD Advisor: Junior-Prof. Dr. Dorothea Baumeister.
Publications: sorted by type of publication | sorted by year.
Dr. Nhan-Tam Nguyen, Postdoc, from November 2013 through December 2017 a member of our group.
Promotion, magna cum laude, Heinrich-Heine-Universität Düsseldorf, December 2017.
Dissertation: "Fair and Square: Issues of Fairness and Computation in Partition Problems."
PhD Advisor: Prof. Dr. Jörg Rothe.
Publications: sorted by type of publication | sorted by year.
Dr. Lena Schend, geb. Piras, from February 2011 through January 2017 a member of our group.
Promotion, magna cum laude, Heinrich-Heine-Universität Düsseldorf, January 2016.
Dissertation: "From Election Fraud to Finding the Dream Team: A Study of the Computational Complexity in Voting Problems and Stability in Hedonic Games."
PhD Advisor: Prof. Dr. Jörg Rothe.
Publications: sorted by type of publication | sorted by year.
Priti Agrawal, DAAD fellow from NIT, Raipur, India, from May through July 2016 a member of our group.
Dr. Anja Rey, from September 2011 through February 2016 a member of our group.
Promotion, summa cum laude, Heinrich-Heine-Universität Düsseldorf, April 2016.
Dissertation: "Beyond Intractability: A Computational Complexity Analysis of Various Types of Influence and Stability in Cooperative Games."
PhD Advisor: Prof. Dr. Jörg Rothe.
After postdoc positions at TU Dortmund and University of Cologne, she currently is an academic teacher at HHU Düsseldorf.
Publications: sorted by type of publication | sorted by year.
Prof. Dr. Trung Thanh Nguyen, from September 2010 through December 2013 a member of our group, holding a fellowship from the Vietnamese government.
Promotion, magna cum laude, Heinrich-Heine-Universität Düsseldorf, November 2013.
Dissertation: "Approximability and Inapproximability of Social Welfare Optimization in Multiagent Resource Allocation."
PhD Advisor: Prof. Dr. Jörg Rothe.
After postdoc positions in Abu Dhabi, United Arab Emirates, first at Masdar Institute of Science and Technology and then at New York University, he currently is a professor at National Economics University in Hanoi, Vietnam.
Publications: sorted by type of publication | sorted by year.
Dr. Magnus Roos, from August 2008 through December 2013 a member of our group.
Promotion, summa cum laude, Heinrich-Heine-Universität Düsseldorf, November 2013.
Dissertation: "Algorithms and Complexity for Fair Division, Voting, and Peer Reviewing."
PhD Advisor: Prof. Dr. Jörg Rothe.
Publications: sorted by type of publication | sorted by year.
Prof. Dr. Gábor Erdélyi, from May 2004 through December 2010 a member of our group.
Promotion, magna cum laude, Heinrich-Heine-Universität Düsseldorf, March 2009.
Dissertation: "The Control Complexity of Sincere-Strategy Preference-Based Approval Voting and of Fallback Voting, and a Study of Optimal Lobbying and Junta Distributions for SAT."
PhD Advisor: Prof. Dr. Jörg Rothe.
After a postdoc position at Nanyang Technological University Singapore, he was a junior professor at Universität Siegen and currently is an associate professor at University of Canterbury in Christchurch, New Zealand.
Publications: sorted by type of publication | sorted by year.
Dr. Claudia Lindner, from September 2008 through June 2010 a member of our group.
Currently, she is a senior research fellow at the University of Manchester in the United Kingdom.
Publications: sorted by type of publication | sorted by year.
PD Dr. Frank Gurski, from January 2009 through June 2010 a member of our group.
Promotion, magna cum laude, Heinrich-Heine-Universität Düsseldorf, July 2003.
Dissertation: "Effiziente Algorithmen für baumstrukturierte Graphklassen."
PhD Advisor: Prof. Dr. Egon Wanke.
Habilitation, Heinrich-Heine-Universität Düsseldorf, October 2007.
Habilitationsschrift: "The Expressive Power and Algorithmic Use of Graph Parameters."
Currently, he works in Egon Wanke's group at Heinrich-Heine-Universität Düsseldorf.
Publications: sorted by type of publication | sorted by year.
Dr. Tobias Riege, from September 2002 through August 2006 a member of our group.
Promotion, magna cum laude, Heinrich-Heine-Universität Düsseldorf, December 2006.
Dissertation: "The Domatic Number Problem: Boolean Hierarchy and Exact Exponential-Time Algorithms."
PhD Advisor: Prof. Dr. Jörg Rothe.
Currently, he is a Chief Executive Director at Riege Software International GmbH, Düsseldorf.
Publications: sorted by type of publication | sorted by year.
Dr. Holger Spakowski, from October 2000 through August 2007 a member of our group.
Promotion, summa cum laude, Heinrich-Heine-Universität Düsseldorf, July 2005.
Dissertation: "Completeness for Parallel Access to NP and Counting Class Separations."
PhD Advisor: Prof. Dr. Jörg Rothe.
Currently, he is a lecturer (with tenure) at University of Cape Town, South Africa.
Publications: sorted by type of publication | sorted by year.