I am a PhD student at Universitat Pompeu Fabra and Université Paris Saclay. My advisors are Gabor Lugosi and Christophe Giraud.

I work on probaility and statistics problems. Most of my research is in combinatorial statistics, where I am interested in inferring the past of growing random graphs from a snapshot of their present state. I also study random graph models introduced to describe real life phenomena. Finally, I am interested in theoretical machine learning and high dimensional statistics.

In other exciting news, I will be joining David Belius and his team for a Postdoc at UniDistance Suisse | FernUni Schweiz. In the spring of 2025 I will be visiting the Simons Laufer Mathematical Science Institute for the Probability and Statistics of Discrete Structures program.

If you are interested in collaborating on some exciting projects, please do not hesitate to contact me!

Simon Briend

My contact in Paris

simon dot briend @ universite-paris-saclay.fr
Institut de Mathématiques d'Orsay
Université Paris-Saclay

My contact in Barcelona

simon dot briend @ upf.edu
Department of Economics
Universitat Pompeu Fabra
Office 20.140

Publications and preprints

  • Simon Briend, Francisco Calvillo, and Gábor Lugosi. "Archaeology of random recursive dags and Cooper-Frieze random networks." Combinatorics, Probability and Computing, 2023, to appear. (pdf)
  • Simon Briend, Luc Devroye and Gábor Lugosi. "Broadcasting in random recursive dags." 2023, ArXiv preprint. (pdf)
  • Simon Briend, Gábor Lugosi, Roberto Imbuzeiro Oliveira. "On the quality of randomized approximations of Tukey's depth." 2023, ArXiv preprint. (pdf)
  • Simon Briend, Christophe Giraud, Gábor Lugosi, Déborah Sulem. "Estimating the history of a random recursive tree." 2024, ArXiv preprint. (pdf)
  • Louigi Addario Berry, Simon Briend, Luc Devroye, Serte Donderwinkel, Céline Kerriou, Gábor Lugosi. "Random friend trees." 2024, ArXiv preprint. (pdf)

Seminars, talks and visits

  • January 2024: Invited talk at Bienal RSME, Pamplona.
  • November 2023: SfS PhD presentations at ETHZ.
  • October 2023: Month long visit to McGill, funded by CRM.
  • June 2023: Invited talk at APS conference, Nancy.
  • May 2023: Month long visit to IMPA, working with Roberto Imbuzeiro Oliveira.
  • November 2022: LIMDA seminar, UPC, Barcelona.
  • Ocotber 2023: Month long visit to McGill, working with Louigi Addario-Berry and Luc Devroye.
  • October 2022: Statistics seminar, UPF, Barcelona.
  • August 2022: Randnet workshop, Eindhoven.
  • April 2023: Month long visit to IMPA, working with Roberto Imbuzeiro Oliveira.


Cool Stuff

A sample of what I do in my spare time.

Plain Academic