Stephan Merz

Stephan Merz is a Professor at the University of Lorraine, affiliated with Inria Nancy - Grand Est and the LORIA research laboratory. His work focuses on formal methods for the specification and verification of distributed systems, with a particular emphasis on the TLA+ specification language developed by Leslie Lamport. Merz has established himself as a leading expert in formal verification through decades of research and numerous collaborations with prominent figures in the field.

Merz's research interests encompass several interconnected areas within theoretical and applied computer science:

• Formal specification languages and their theoretical foundations
• Distributed algorithms and fault-tolerant systems
• Model checking and theorem proving techniques
• Verification of consensus algorithms and synchronization protocols
• Security policy verification in modern network architectures

His recent publications reveal a consistent research trajectory advancing both the theoretical underpinnings and practical applications of formal methods. The 2021-2023 publications demonstrate particular focus on extending PlusCal (a pseudo-algorithm language for TLA+), developing automatic verification techniques for distributed algorithms like the Bakery algorithm, and tackling synchronization challenges in dynamic networks. His award-winning work on synchronization modulo k highlights the practical significance of his theoretical contributions.

Merz has received notable recognition for his research, including a best paper award at the 23rd International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS 2021) for his work on synchronization in dynamic networks. This award underscores the impact and innovation of his research within the distributed systems community.

Throughout his career, Merz has collaborated extensively with researchers across institutions, co-authoring papers with Leslie Lamport and other leading figures in formal methods. His work on the TLA+ Proof System (TLAPS) has been particularly influential, bridging the gap between theoretical formal methods and practical verification tools. He has also contributed significantly to verifying real-world protocols like Pastry (a distributed hash table implementation).

Merz is actively involved with the LORIA research laboratory, a joint unit of INRIA, CNRS, and the University of Lorraine, where he contributes to advancing research in formal methods and their application to critical systems. His work continues to influence both academic research and industrial applications of formal verification techniques.