Odd-primary torsion in the homology of unordered configurations on the torus
- Authors
- N. I., Victor Roca i Lucio.
- Publication
- Preprint v2 (2026).
- PDF.
- arXiv:2607.23459
- arXiv:2607.23459.
- hal-05705593
- hal-05705593.
Najib Idrissi
Maître de conférences (HDR) in mathematics
Maître de conférences (HDR) at Université Paris Cité — similar to associate professor; HDR is the French habilitation to supervise doctoral research.
Institut de Mathématiques de Jussieu–Paris Rive Gauche (IMJ-PRG), deputy manager of the team-project Algebraic Geometry & Topology (TGA)
Scientific coordinator of the ANR Young Researcher grant Structure and Homotopy of Configuration Spaces (SHoCoS)
Junior Member of the Institut Universitaire de France (IUF) for 2025–2030
My main mathematical interests are in the fields of operads, as well as in 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.
See also: arXiv, HAL, MathSciNet, zbMATH, ORCID.
Research
Preprints
Homology of configuration spaces in positive characteristic via point-set constructions
- Authors
- N. I., Victor Roca i Lucio.
- Publication
- Preprint v1 (2026).
- Software
- Software.
- PDF.
- arXiv:2606.26802
- arXiv:2606.26802.
- hal-05670310
- hal-05670310.
Plethysm for characters of relative operads and PROPs
- Authors
- N. I., Erik Lindell.
- Publication
- Preprint v2 (2025).
- Software
- Software.
- PDF.
- arXiv:2505.05910
- arXiv:2505.05910.
- hal-05061606
- hal-05061606.
- Source
- Source.
A model for framed configuration spaces of points
- Authors
- Ricardo Campos, Julien Ducoulombier, N. I., Thomas Willwacher.
- Publication
- Preprint v2 (2025).
- PDF.
- arXiv:1807.08319
- arXiv:1807.08319.
- hal-03835341
- hal-03835341.
Configuration Spaces of Surfaces
- Authors
- Ricardo Campos, N. I., Thomas Willwacher.
- Publication
- Preprint v2 (2020).
- PDF.
- arXiv:1911.12281
- arXiv:1911.12281.
- hal-02423726
- hal-02423726.
Publications
Homotopy Prefactorization Algebras
- Authors
- N. I., Eugene Rabinovich.
- Publication
- Res. Math. Sci. (2024).
- PDF.
- 10.1007/s40687-024-00456-9
- 10.1007/s40687-024-00456-9.
- arXiv:2304.13011
- arXiv:2304.13011.
- hal-04082483
- hal-04082483.
- MR4763063
- MR4763063.
- Zbl07875603
- Zbl07875603.
Non-formality of Voronov's Swiss-Cheese operads
- Authors
- N. I., Renato Vasconcellos Vieira.
- Publication
- Q. J. Math. (2024).
- PDF.
- 10.1093/qmath/haad041
- 10.1093/qmath/haad041.
- arXiv:2303.16979
- arXiv:2303.16979.
- hal-04053257
- hal-04053257.
- MR4732946
- MR4732946.
- Zbl07936839
- Zbl07936839.
- Source
- Source.
Configuration Spaces of Manifolds with Boundary
- Authors
- Ricardo Campos, N. I., Pascal Lambrechts, Thomas Willwacher.
- Publication
- Astérisque (2024).
- PDF.
- 10.24033/ast.1222
- 10.24033/ast.1222.
- arXiv:1802.00716
- arXiv:1802.00716.
- hal-01721634
- hal-01721634.
- MR4764220
- MR4764220.
- Zbl07882597
- Zbl07882597.
Curved Koszul duality of algebras over unital versions of binary operads
- Author
- N. I.
- Publication
- J. Pure Appl. Algebra (2023).
- PDF.
- 10.1016/j.jpaa.2022.107208
- 10.1016/j.jpaa.2022.107208.
- arXiv:1805.01853
- arXiv:1805.01853.
- hal-01786218
- hal-01786218.
- MR4477956
- MR4477956.
- Zbl07595193
- Zbl07595193.
Real Homotopy of Configuration Spaces: Peccot Lecture, Collège de France, March & May 2020
- Author
- N. I.
- Publication
- Lecture Notes in Mathematics (2022).
- 10.1007/978-3-031-04428-1
- 10.1007/978-3-031-04428-1.
- hal-03821309
- hal-03821309.
- MR4461096
- MR4461096.
- Zbl07529469
- Zbl07529469.
Boardman–Vogt resolutions and bar/cobar constructions of (co)operadic (co)bimodules
- Authors
- Ricardo Campos, Julien Ducoulombier, N. I.
- Publication
- High. Struct. (2021).
- PDF.
- 10.21136/HS.2021.09
- 10.21136/HS.2021.09.
- arXiv:1911.09474
- arXiv:1911.09474.
- hal-01786218
- hal-01786218.
- MR4367224
- MR4367224.
- Zbl7482172
- Zbl7482172.
Formality of a higher-codimensional Swiss-Cheese operad
- Author
- N. I.
- Publication
- Algebr. Geom. Topol. (2022).
- PDF.
- 10.2140/agt.2022.22.55
- 10.2140/agt.2022.22.55.
- arXiv:1809.07667
- arXiv:1809.07667.
- hal-01878406
- hal-01878406.
- MR4413816
- MR4413816.
- Zbl07518301
- Zbl07518301.
The Lambrechts–Stanley Model of Configuration Spaces
- Author
- N. I.
- Publication
- Invent. Math. (2019).
- PDF.
- 10.1007/s00222-018-0842-9
- 10.1007/s00222-018-0842-9.
- arXiv:1608.08054
- arXiv:1608.08054.
- hal-01438861
- hal-01438861.
- MR3935037
- MR3935037.
- Zbl07051043
- Zbl07051043.
Swiss-Cheese Operad and Drinfeld Center
- Author
- N. I.
- Publication
- Israel J. Math. (2017).
- PDF.
- 10.1007/s11856-017-1579-7
- 10.1007/s11856-017-1579-7.
- arXiv:1507.06844
- arXiv:1507.06844.
- hal-01438863
- hal-01438863.
- MR3704940
- MR3704940.
- Zbl06808424
- Zbl06808424.
Opérades et Structures Commutatives à Homotopie Près
- Author
- N. I.
- Publication
- Grad. J. Math. (2016).
- PDF.
- hal-03997161
- hal-03997161.
- MR3848667
- MR3848667.
- Zbl1497.18028
- Zbl1497.18028.
- Journal
- Journal.
Theses
Structure of Configuration Spaces
- Author
- N. I.
- Publication
- Habilitation à Diriger des Recherches (HDR) (2025).
- PDF.
- Source
- Source.
- tel-05082275
- tel-05082275.
- Defense
- Defense.
Operadic Formality and Homotopy of Configuration Spaces
- Author
- N. I.
- Publication
- Doctoral thesis (2017).
- PDF.
- Source
- Source.
- tel-01731389
- tel-01731389.
- 2017LIL10078
- 2017LIL10078.
- Defense
- Defense.
Homologie et complexes de déformations d’opérades Eₙ
- Author
- N. I.
- Publication
- Master's thesis (2014).
- PDF.
Teaching for 2026−2027
- Institution
- Université Paris Cité.
- Cursus
- M2 Mathématiques Fondamentales (S1).
- Responsibilities
- Lectures: 24h.
Algorithmes et Programmation 3 (2026−2027)
- Institution
- Université Paris Cité.
- Cursus
- L2 Maths (S1).
- Responsibilities
- Lectures: 27h, Organization: 9h.
- Notes
- Notes.
Recent & upcoming talks
Moduli spaces and graph complexes in algebra, geometry and physics @ Diablerets
- Title
- Homology of configuration spaces in positive characteristic via point-set constructions.
- Event
- Moduli spaces and graph complexes in algebra, geometry and physics.
- Location
- Diablerets.
- On
- On .
- Event page
- Event page.
Séminaire de géométrie @ Institut de Mathématiques de Jussieu-Paris Rive Gauche
- Title
- Introduction aux espaces de configuration des variétés.
- Event
- Séminaire de géométrie.
- Location
- Institut de Mathématiques de Jussieu-Paris Rive Gauche.
- On
- On .
- Event page
- Event page.
- Notes
- Notes.
Séminaire ART @ Université de Strasbourg
- Title
- Pléthysme pour les opérades colorées et les prop(érade)s.
- Event
- Séminaire ART.
- Location
- Université de Strasbourg.
- On
- On .
- Related
- Related.
- Event page
- Event page.
- Notes
- Notes.
Soutenance Habilitation à Diriger des Recherches (HDR) @ Université Paris Cité
Algebra/Topology Seminar @ University of Copenhagen
- Title
- (Non-)formality of Swiss-Cheese operads.
- Event
- Algebra/Topology Seminar.
- Location
- University of Copenhagen.
- On
- On .
- Related
- Related.
- Event page
- Event page.
- Notes
- Notes.
Software
Resumable batch PDF extraction and OCR pipeline combining native PyMuPDF extraction with Mistral OCR.
SageMath models of combinatorial operads and cooperads for computations in algebraic topology and configuration spaces.
- Authors
- N. I., Victor Roca i Lucio.
- Language
- Python, SageMath
- License
- GPL-3.0
- Paper
- Paper.
- 10.5281/zenodo.20843321
- 10.5281/zenodo.20843321.
- hal-05674637
- hal-05674637.
- Source
- Source.
- SWH
- SWH.
- PyPI
- PyPI.
Experimental multi-agent first-pass reader for mathematical papers, surfacing possible proof gaps, notation problems, exposition issues, and overclaims.
Wolfram Mathematica code computing characters of relative operads and PROPs via plethysm.
Web interface to Université Paris Cité's timetable system, turning the ADE API into human-readable schedules for Bachelor's and Master's students.
- Authors
- Pascal Molin, Frédéric Han, N. I.
- Language
- JavaScript, React, Python
- Source
- Source.
- Live version
- Live version.
Recent blog posts
When does torsion first appear in configuration spaces of a torus?
- Published
- Published .
Git for Mathematicians (4): The Practice [daily work]
- Published
- Published .
- Published
- Published .
- Updated
- Updated .
My full last name is “Idrissi-Kaïtouni” and you may find this spelling in some places, e.g., my email address.
Contact
- Email: najib.idrissi-kaitouni@u-pariscite.fr
- Address: Bâtiment Sophie Germain, 8 place Aurélie Nemours, F-75013 Paris, France
- Office number: SG-7032 (7th floor)
- Phone: (+33) 01 57 27 91 16