Patrick Cousot

Patrick Cousot is Professor of Computer Science at New York University's Courant Institute of Mathematical Sciences, holding the Julius Silver, Roslyn S. Silver, and Enid Silver Winslow Professorship. He maintains a significant affiliation with the École normale supérieure in Paris, France, where he has been a professor since 1991. His academic career includes previous positions at the École Polytechnique (1984-1997), University of Metz (1979-1984), and as a Research Scientist at the French National Center for Scientific Research (CNRS).

Education:

• Engineer from École des Mines of Nancy (1971)
• Doctor Engineer (PhD) in Computer Science (1974) from the University of Grenoble
• Doctor ès Sciences in Mathematics (1978) from the University of Grenoble

Cousot is globally recognized as the co-inventor, with Radhia Cousot, of Abstract Interpretation (1975), a foundational theory for sound approximation of mathematical structures involved in computer system behavior. This theory enables systematic derivation of methods for approximating undecidable or highly complex problems across semantics, verification, model-checking, static analysis, program transformation, and optimization. Abstract interpretation has achieved significant industrial adoption, particularly in safety and security verification of complex hardware and software systems.

His research output shows consistent evolution from theoretical foundations to practical applications. Recent work (2022-2025) focuses on program logics, incorrectness logic, and hyperlogics, extending abstract interpretation's theoretical scope. Earlier work established the ASTRÉE and ASTRÉEA static analyzers, which have been successfully deployed in industrial settings, most notably at Airbus France for verifying safety-critical avionic software.

Scientific recognition:

• Silver Medal of the CNRS (1999)
• Honorary doctorate from Universität des Saarlandes (2001)
• Grand Prix of Computer Science from EADS Corporate Research Foundation (2006)
• Humboldt Research Award (2008)
• ACM SIGPLAN Programming Languages Achievement Award (2013)
• Harlan D. Mills Award (2014)
• Member of Academia Europaea (2006)

Cousot has mentored doctoral students including David Monniaux and leads the "Abstract interpretation and semantics" research team at ENS/CNRS and the "Abstraction" project at INRIA. His 2021 MIT Press book "Principles of Abstract Interpretation" represents a comprehensive synthesis of the field he pioneered. His ongoing teaching includes graduate courses on Abstract Interpretation and Honors Programming Languages at NYU for 2025.

His work continues to influence both theoretical computer science and practical software verification, with applications spanning transportation, communications, and medical systems, demonstrating the enduring relevance of his foundational contributions to computing.