Najib Idrissi’s math page

Intro

I am a maître de conférences at the mathematics department of Université Paris Cité. I am a member of the Institut de Mathématiques de Jussieu–Paris Rive Gauche (IMJ-PRG) and deputy head of the team-project “Algebraic Geometry & Topology” (TGA).

I am the scientific coordinator of the ANR Young Researcher project “Structure and Homotopy of Configuration Spaces” (SHoCoS).

I obtained my PhD in 2017 from Université de Lille under the supervision of Benoit Fresse, and my Habilitation à Diriger des Recherches (HDR) in 2025 from Université Paris Cité. You can find more information in my CV.

My main mathematical interests are in the fields of operads, as well as their applications to algebraic topology and homological algebra. I am especially interested in the study of configuration spaces of manifolds, their links to graph complexes, and the invariants they define. These days, I am also interested in the representation stability phenomenon.

A collective open letter on the reconstruction of universities in Gaza. This letter was also published in the April 2025 edition of the French Math Society’s Gazette.

My full last name is “Idrissi-Kaïtouni” and you may find this spelling in some places, e.g., my email address.

Contact

Research

See also: arXiv, HAL, MathSciNet, zbMATH, ORCID.

Preprints

  1. Plethysm for characters of relative operads and PROPs

    NI, Erik Lindell. Preprint v1, 32 pages Online on .
  2. A model for framed configuration spaces of points

    Ricardo Campos, Julien Ducoulombier, NI, Thomas Willwacher. Preprint v2, 47 p. Online on . Updated on .
  3. Configuration Spaces of Surfaces

    Ricardo Campos, NI, Thomas Willwacher. Preprint v2, 50 pages. Online on . Updated on .

Publications

  1. Homotopy Prefactorization Algebras

    NI, Eugene Rabinovich. In: Res. Math. Sci. 11.45 (2024) Online on . Accepted on . Updated on .
  2. Non-formality of Voronov's Swiss-Cheese operads

    NI, Renato Vasconcellos Vieira. In: Q. J. Math. 75.1 (2024), pp. 63-95 Online on . Accepted on . Updated on .
  3. Configuration Spaces of Manifolds with Boundary

    Ricardo Campos, NI, Pascal Lambrechts, Thomas Willwacher. Astérisque 449 (2024), ISBN: 978-2-85629-990-6 Online on . Accepted on . Updated on .
  4. Curved Koszul duality of algebras over unital versions of binary operads

    NI. J. Pure Appl. Algebra 227.3 (2023) Online on . Accepted on . Updated on .
  5. Real Homotopy of Configuration Spaces: Peccot Lecture, Collège de France, March & May 2020

    NI. Lecture Notes in Mathematics 2303. Cham: Springer, 2022. 210 pp. ISBN: 978-3-031-04427-4. Online on . Accepted on . Updated on .
  6. Boardman–Vogt resolutions and bar/cobar constructions of (co)operadic (co)bimodules

    Ricardo Campos, Julien Ducoulombier, NI. In: High. Struct. 5.1, pp. 293–366 (2021), 74 pages. Online on . Accepted on . Updated on .
  7. Formality of a higher-codimensional Swiss-Cheese operad

    NI. In: Algebr. Geom. Topol. 22.1 (2022), pp. 55–111 Online on . Accepted on . Updated on .
  8. The Lambrechts–Stanley Model of Configuration Spaces

    NI. In: Invent. Math. (2019) 216.1, pp. 1–68. Online on . Accepted on . Updated on .
  9. Swiss-Cheese Operad and Drinfeld Center

    NI. In: Israel J. Math. (2017) 221.2, pp. 941–972. Online on . Accepted on . Updated on .
  10. Opérades et Structures Commutatives à Homotopie Près

    NI. In: Grad. J. Math. (2016) 1.1, pp. 9–17. Online on .

Theses

  1. Structure of Configuration Spaces

    NI. Habilitation à Diriger des Recherches (HDR), Université Paris Cité Online on .
  2. Operadic Formality and Homotopy of Configuration Spaces

    NI. Doctoral thesis, Université de Lille. Online on .
  3. Homologie et complexes de déformations d’opérades $E_n$

    NI. Master's thesis, Université Paris Diderot. Online on .

Teaching for 2025−2026

  1. Algèbre (2025−2026)

    Université Paris Cité. M1 Mathématiques-Informatique Cryptographie (S1). Lectures: 24h. Exercise sessions: 33h.

Recent talks

  1. Soutenance Habilitation à Diriger des Recherches (HDR) @ Université Paris Cité

    On . Title: Structure of Configuration Spaces.
  2. Seminar @ University of Copenhagen

    On . Title: (Non-)formality of Swiss-Cheese operads.
  3. Séminaire de topologie @ Université de Lille

    On . Title: (Non-)formalité des opérades Swiss-Cheese.
  4. Topology Intercity Seminar (TopICS) @ Utrecht Universiteit

    On . Title: (Non-)formality of Swiss-Cheese operads.
  5. Topology seminar @ Università degli studi di Roma "Tor Vergata"

    On . Title: (Non-)formality of Swiss-Cheese operads.
  6. Séminaire "Des Mathématiques" @ ENS de Paris

    On . Title: De l'ordre dans les tresses.
  7. Algebra Days in Caen 2024: Algebraic aspects of configuration spaces and moduli spaces @ Université de Caen Normandie

    On . Title: Operadic structure of configuration spaces (mini-course).
  8. Workshop Alps 2024 @ Sainte-Foy-Tarentaise

    On . Title: Formality and non-formality of the Swiss-Cheese operad.
  9. Séminaire Bourbaki du vendredi @ Institut Henri Poincaré

    On . Title: Espaces de modules de courbes et construction de classes caractéristiques.
  10. Répétition pour le séminaire Bourbaki du vendredi de la semaine suivante @ Université de Caen

    On . Title: Espaces de modules de courbes et construction de classes caractéristiques.

Recent blog posts

  1. Appointment at the Institut Universitaire de France 🏛️

    Published .
  2. Habilitation defended successfully 🥳

    Published .
  3. arXiv2BibLaTeX: Create a BibLaTeX entry from arXiv ✖️

    Published . Updated .
  4. Fun with DALL-E 2 🤖

    Published .
  5. ANR Young researcher project “Structure and Homotopy of Configuration Spaces” (SHoCoS) 📜

    Published .
  6. “Real Homotopy of Configuration Spaces” is out 📕

    Published .
  7. LaTeX shenanigans 🖥️

    Published .
  8. Using math software for teaching calculus 🧮

    Published .
  9. Peccot Lecture notes accepted in Lecture Notes in Mathematics

    Published .
  10. Naming news for 2022

    Published .