email : simonjubert [at] gmail.com

Click here for my CV

I am a post-doctorant at IMJ-PRG in Sorbonne Université (Paris) since september 2023. My referent professor is Eleonora Di Nezza.  From january 2026 until september 2026, I will be post-doctorant at Tor Vergata (Roma) and will work with Eleonora Di Nezza.

I was a  PhD student at the Université du Québec à Montréal (UQAM) and  at the Université de Toulouse III (UT3) under the co-supervision of Vestislav Apostolov  and Eveline Legendre .  I defended my PhD thesis entiled "Yau--Tian--Donaldson correspondence on a class of toric fibrations" the 21 of June 2023. 

Research interests

My research interests lie in differential geometry and geometric analysis. Examples of topics include:

• Existence of Kähler metrics with special curvature condition.

• Stability of complex manifolds with large symmetry group.

Publication and pre-print

The list of my pre-print is here

• Weighted cscK metric (II): the continuity method, arXiv:2503.22183 (2025) , (with Eleonora Di Nezza and Abdellah Lahdili).

• Numerical invariant for weighted cscK metrics, arXiv:2503.01680 (2025) , (with Thibaut Delcroix).

The list of my publications is here

• Weighted cscK metric (I): a priori estimates,  Journal of Functional Analysis, 289 (11) 2025 (with Eleonora Di Nezza and Abdellah Lahdili). 

• An effective weighted K-stability condition for polytopes and semisimple principal toric fibrations,  Annales Henri Lesbegue,  6 (2023) 117-149. (with Thibaut Delcroix). 

• A Yau--Tian--Donaldson correspondence on a class of toric fibrations, Annales de l'Institut Fourier, 73 (2023) no. 6, pp. 2567-2604. 

• Weighted K-stability and coercivity with applications to extremal Kähler and Sasaki metrics,  Geometry & Topology, 27 (2023) 8, 3229-3302 (with Vestislav Apostolov  and Abdellah Lahdili). 

Invited talks

Talks at research seminars, reading seminars and working groups 

• ANR  Karmapolis workshop  - TBA (2026 May)

• Geometry, exchanges and perspectives  - Institut Henri Poincaré (2025 October)

• Deformations and fibrations - Université de Brest - France.  (2025 June)

• Weighted extremal Kähler metrics on resolutions of singularities - organisé par l'UQAM, on Zoom (2025 march)

• geofloquant : Geometric Flows and Quantization of Kähler Metrics  - Vrije Universiteit Brussel  (2025 January)

• Travaux récents sur les métriques de Kähler à courbure spéciale  - UQAM (2024 June)

• Séminaire d’Analyse et Géométrie - Sorbonne Université, France (2023 December).

• Séminaire de géométrie et tolopologie - UQAM (2023 May)

• Séminaire de géométrie - Université de Nantes (2022 December).

• Séminaire d'analyse et géométrie - Sorbonne Université (2022 November ).

• Complex analysis seminar - Gothenburg University (2022 November ).

•  Geometria em Lisboa Seminar - Instituto Superior Tecnico, Lisboa, Portugal (on Zoom, 2022 November).

•  Séminaire de géométrie  - Université de Bretagne Occidentale (2022 October).

• Young researchers in Kähler and Hermitian geometry - Faculté des Sciences de l'Université de  Montpellier (2022  June).

• Reading seminar on Weighted cscK metrics and semisimple principal fibrations (arXiv:2104.09709). Organized by Thibaut Delcroix (On Zoom, Spring 2022).

•  Séminaire Analyse Harmonique - Université Paris-Saclay (2022 April).

•  Working group on Algebraic Complex and Differential Complex Geometry, organized by Ruadhai Dervan and Lars  Martin Sektnan (On Zoom, 2021 - 2022).

• Séminaire compréhensible - Université Grenoble Alpes (2022 Januray).

• PhD Student seminar Toulouse - Université Toulouse III (2021 December).

•  Seminar in K-stability and Kähler Geometry - University of Cambridge (2021 September).

•   Cirget Junior Seminar (PhD and Master students seminar of the 4 universities on Montréal) - (On Zoom, 2020 September).

Teaching

Previously, I have taught 

• TA for a course on ODE’s, third year undergraduate degree.  Université Toulouse III (2022).

• TA for a course on Complex analysis, third year undergraduate degree.  Université Toulouse III (2021).

•  Instructor for Differential Calculus, first year undergraduate degree.   Université du Québec à Montréal (2021).

•  TA for a course on Statistics, first year undergraduate degree. Université du Québec à Montréal  (2020).

•  TA for a course on Statistics, first year undergraduate degree. Université du Québec à Montréal  (2019).

• Mathematical teacher in middle school. Collège Nelson Mandela, France. (2018 - 2019).

• Colle in 2nd year of Classe Préparatoire (oral examinator for undergraduate student), Lycée Pierre de Fermat, (2017 - 20828)