PeopleofSuperintelligence

Researcher

Frédéric Dupuis

Frédéric Dupuis is an associate professor of computer science at the Université de Montréal and a Mathlib maintainer whose research spans quantum information and formal mathematics. He defended a thesis on quantum computing at the University of Montreal in 2009, then worked as a postdoctoral researcher in Zurich, did research in Denmark, and lectured in Brno before joining CNRS's LORIA team by 2018. With Omar Fawzi and Renato Renner, he developed entropy-accumulation methods for device-independent cryptography and later formalized functional-analysis results in Lean with Mathlib collaborators. In 2024, he and Ashutosh Marwah proved a universal chain rule for a variant of smooth min-entropy that equals the conventional smooth min-entropy up to a constant.

Timeline

  1. 2009

    A quantum computing thesis

    He defends a thesis on quantum computing at the University of Montreal in 2009; it covers quantum cryptography and quantum error correction.

  2. 2016

    The entropy accumulation theorem

    In 2016, he, Omar Fawzi, and Renato Renner show that entropy accumulation can hold without assuming independent parts. Their approach yields essentially optimal security bounds for device-independent cryptography.

  3. By 2018

    Joining CNRS at LORIA

    After his 2009 thesis, he works as a postdoctoral researcher in physics in Zurich, does computer-science research in Denmark, and serves as a university lecturer in Brno. By 2018, he is a CNRS researcher in the Loria's Mocqua team, continuing quantum information research in Nancy.

  4. Since 2020

    Formalizing mathematics in Lean

    Since 2020, he formalizes mathematics in Lean and serves as a Mathlib maintainer.

  5. 2022

    Functional analysis in Mathlib

    With Robert Y. Lewis and Heather Macbeth, he formalizes semilinear maps in Lean's Mathlib and proves the Fréchet–Riesz representation theorem and the spectral theorem for compact self-adjoint operators.

  6. 2024

    A universal entropy chain rule

    In 2024, he and Ashutosh Marwah prove a universal chain rule for a variant of smooth min-entropy that equals the conventional smooth min-entropy up to a constant.

  7. 2025

    A quantum protocols consortium

    In 2025, he is among four Université de Montréal professors set to collaborate with the University of Ottawa on its Québec Ontario consortium on quantum protocols.

  8. As of October 2026

    Associate professor and Mathlib maintainer

    As of October 2026, he is an Associate Professor of Computer Science at the Université de Montréal and a Mathlib maintainer.

  1. Google had the most people shaping AI every year from 2014 to 2025Our estimates of which organizations employed the most people shaping AI from 1961 to 2025, with a year-by-year chart.
  2. The United States employs an estimated 53% of people in our data with a known employment countryOur estimates of where AI careers are concentrated now and how countries’ shares of dated positions changed over time.
  3. 46% of living people in our data with known birth and employment countries work outside their birth countryOur estimate of cross-border careers in AI, from country of birth and the country of each current organization.
  4. More people shaping AI studied at Massachusetts Institute of Technology than at any other institutionOur estimates of where the people shaping AI studied and where their careers led, from education records in cited biographies.

Colleagues

People named in this biography, and people with dated positions at the same organization in the same years.

Sources and credits

Photo: We have no published photo of Frédéric Dupuis yet. Send us a free-licensed photo.

  1. Welcome to Frédéric Dupuis loria.fr. Checked 19 October 2026.
  2. Entropy accumulation arxiv.org. Checked 19 October 2026.
  3. Mathlib maintainers leanprover-community.github.io. Checked 19 October 2026.
  4. Formalized functional analysis with semilinear maps arxiv.org. Checked 19 October 2026.
  5. Universal chain rules from entropic triangle inequalities arxiv.org. Checked 19 October 2026.
  6. Financement de deux projets en physique quantique menés par des chercheurs de l’UdeM nouvelles.umontreal.ca. Checked 19 October 2026.