Université de Cergy-Pontoise,

Site de Saint-Martin,

2 avenue Adolphe Chauvin,

95300 Pontoise, France.

Email: Jules.Martel-Tordjman(at)cyu(dot)fr

I am currently a postdoc (non-permanent enseignant--chercheur contractuel) at Cergy Paris University.

**Research Interests**

On one hand I study quantum topology, namely topological invariants arising from quantized Lie algebras such as knot invariants, braid representations, quantum representations of mapping class groups.

On the other hand, I'm interested in homology of configuration spaces, related homology techniques in the context of local coefficients.

I have defended my PhD in December 2019, under the supervision of Professor F. Costantino, at Université Paul Sabatier, Toulouse 3. It is entitled ``Homological interpretations for quantum invariants''.

Then I was a postdoc fellow at the Max Planck Institute for Mathematics, Bonn, and then at the Institut de mathématiques de Bourgogne, in Dijon, France, and then at the University of Zürich, Swiss.

**Announcement: ** There will be Skein days in Cergy--Pontoise, on December 9-10-11 ! Contact me if you wish to participate.

**Accepted paper**

- J. Martel,
*A homological model for U*ArXiv,_{q}sl(2) Verma-modules and their braid representations*Geometry & Topology* - J. Martel,
*The non semi-simple TQFT of the sphere with four punctures*ArXiv (June 2020),Volume 30, Issue 06.*Jounral of knot theory and its ramifications* - J. Martel,
*Colored version for Lawrence representations*, to appear at, ArXiv preprint.*NYJ Maths* - J. Martel,
*Colored Jones polynomials and abelianized Lefschetz numbers*, ArXiv preprint,*Advances in Maths* - J. Martel, S. Willetts,
*Unified invariant of knots from homological braid action on Verma modules*, ArXiv preprint,*Proceedings of the London Maths Society*

**Preprints**

- M. De Renzi, J. Martel,
*Homological Construction of Quantum Representations of Mapping Class Groups*, submitted, ArXiv preprint. - M. De Renzi, J. Martel, B. Wang,
*Hennings TQFTs for cobordisms decorated with cohomology classes*, submitted, ArXiv preprint. - R. Detcherry, J. Martel,
*On kernels of homological representations of mapping class groups*, PDF FILE, ArXiv preprint - S. Bigelow, J. Martel,
*Quantum groups from homologies of configuration spaces*, PDF FILE, ArXiv preprint - M. De Renzi, J. Martel,
*On Integrality of Non-Semisimple Quantum Representations of Mapping Class Groups*, submitted, ArXiv preprint.

**Organisation**

- I organize thematic days in Cergy--Pontoise (December 2024):
*Skein days*. - I am an organizer of the
*Geometry seminar of Cergy--Pontoise*. - I (co)-organized the following weekly seminar:
*Mapping class groups of surfaces: different aspects*. It happens every tuesday in Dijon (France) for the year 2021-2022. - I (co)-organize the annual conference
:*Topology Between The Waves*- First edition:
*BTW I: Homological and quantum invariants*, at the CIRM in Marseille (France), February 2021. - Second edition:
*BTW II: Sliceness, Exotic pairs and Quantum invariants*, in Aussois (France), April 2022. - Third edition:
*BTW III: Morse and Floer Theories*, at the CIRM in Marseille (France), January 2023. - Fourth edition:
*BTW IV: Knot Floer Homology*, at the Station biologique du CNRS, Besse (France), Feb. 2024. - Fifth edition:
*BTW V: Giroux's correspondence*, at the Station biologique du CNRS, Besse (France), March 2024.

- First edition:

**PhD thesis**

My thesis is called "Homological interpretations for quantum invariants", supervised by F. Costantino. You can read the manuscript (not yet on HAL for covid reasons) .

**Talks (Videos)**

- J. Martel,
*A full homological model for quantum Verma modules and their representations of braid groups.*, [K-OS] seminar, 30/04/2020. - J. Martel,
*Braid representations and Kohno's theorem (I) and (II).*, Matemale winter school, April 2018, talk (I), and talk (II).

- J. Martel, J.-M. Valtat,
*Une clinique de l'angoisse à partir de la mathématiques des noeuds.*, Ecole de Psychanalyse du Forum des Champs Lacaniens, Paris, 29/03/2024.

**A little bit of epidemiology**