Research

Formality of a higher-codimensional Swiss-Cheese operad
Najib Idrissi – Preprint (v1), 40 pages, 2018.
PDF arXiv:1809.07667 hal-01878406
Curved Koszul Duality for Algebras over Unital Operads
Najib Idrissi – Preprint (v2), 32 pages, 2018.
PDF arXiv:1805.01853 hal-01786218
A model for framed configuration spaces of points
Ricardo Campos, Julien Ducoulombier, Najib Idrissi, Thomas Willwacher – Preprint, 27 pages, 2018.
PDF arXiv:1807.08319
Configuration Spaces of Manifolds with Boundary
Ricardo Campos, Najib Idrissi, Pascal Lambrechts, Thomas Willwacher – Preprint, 107 pages, 2018.
PDF arXiv:1802.00716
Operadic Formality and Homotopy of Configuration Spaces
Najib Idrissi – Doctoral Thesis, Université Lille 1, 2017.
PDF Code University Defense
Najib Idrissi – Israel J. Math. 221.2, pp. 941–927, 2017.
PDF arXiv:1507.06844 hal-01438863 DOI:10.1007/s11856-017-1579-7 MR3704940 Zbl06808424
The Lambrechts–Stanley Model of Configuration Spaces
Najib Idrissi – Preprint, in revision, 50 pages, 2016.
PDF arXiv:1608.08054 hal-01438861
PDF Journal

Talks

TBA
Abstract: TBA

TBA
Abstract: TBA

TBA
Abstract: TBA

Derived Geometry and Higher Categorical Structures in Geometry and Physics
2018-06-20 – Fields Institute, Toronto, Canada
Slides Video Article

Curved Koszul duality and factorization homology
Abstract: Koszul duality is a powerful tool that can be used to produce resolutions of algebras in many contexts. In this talk, I explain how to use curved Koszul duality for algebras over unital operads to compute the factorization homology of a closed manifold with values in the algebra of polynomial functions on a standard shifted symplectic space.

Departmental colloquium
2018-06-05 – University of Regina, Regina, Canada
Slides

Configuration Spaces and Graph Complexes
Abstract: Configuration spaces of points are classical objects in algebraic topology that appear in a wide range of applications. Despite their apparent simplicity, they remain intriguing. Kontsevich proved in the 90's that they are intimately related to "graph complexes", combinatorial objects that can be used to explicitly describe the homotopy type of configuration spaces in a Euclidean space. After recalling the above story, I will explain a conjecture of Lambrechts and Stanley about configuration spaces of simply connected closed manifolds. I will then give an idea of the proof of this conjecture, using graph complexes similar to the ones appearing in the works of Kontsevich. I will also describe recent generalizations: for manifolds with boundary, and for so-called "framed" configuration spaces (j/w Campos, Ducoulombier, Lambrechts, and Willwacher). Finally, I will talk about applications of these results.

Blog

Life in Paris
2018-09-19 ⋅ #job #paper

I’ve been in Paris for almost a month now. It’s been great! People at the math department and the math institute(1) have all been welcoming and have helped me a lot in getting settled. There have been a lot of administrative procedures to complete – and I am unfortunately not done – and it’s great to have had people being able to guide me. And I finally found an apartment in Paris! It was unexpectedly hard: faculty salaries are not very high compared to the cost of living, and the first year is technically on “probation”, meaning I could theoretically get fired next August… Landlords in Paris have very rigid expectations and this made me fall outside them.

Why is it called “Paris 7”?
2018-06-26 ⋅ #job

One question people often ask is why the university is called “Paris 7”, followed by the realization that there are (were!) thirteen universities in Paris, numbered from “Paris 1” to “Paris 13”. Here’s an attempt at explaining it (though I’m sure I can’t cover all the reasons.)

Next Stop: Paris!
2018-06-20 ⋅ #job
I finally got the confirmation from the ministry: I definitively got the job and I will be appointed in Paris-VII! A new life is about to begin… I’ve been at the Fields Institute (in Toronto) for a week now, to participate in the summer school on derived geometry and higher structures. The lectures and talks are delightful! This whole conference is impressive! Hopefully my own talk yesterday was not out of place.