Hussein Mourtada

Hussein MOURTADA

Associate Professor in Mathematics

Institut de Mathématiques de Jussieu-Paris Rive Gauche
Geometry and Dynamics Team
Université Paris Cité
(Paris-Diderot Campus)
Mathematics Department
Sophie Germain Building
Case 7012
75205 Paris Cedex 13, France
Office: 736
Phone: (33) 1 57 27 91 02
Email: hussein.mourtada@imj-prg.fr

📋 About

I am an Associate Professor in mathematics at Université Paris Cité (Paris Diderot campus, formerly Paris 7).

I defended my HDR (Habilitation) Geometric Approaches to Resolution of Singularities and Integer Partitions in December 2020.

I defended my PhD thesis, On the geometry of jet schemes of some singular algebraic varieties, in June 2010 at the University of Versailles Saint-Quentin-en-Yvelines; my thesis advisor was Monique Lejeune-Jalabert.

📄 My complete CV (PDF)

🌟 Featured in Quanta Magazine

Popular science article by Jordana Cepelewicz published in Quanta Magazine about a research topic I helped develop, linking singularities and number theory in the spirit of Ramanujan.

Research Area

My research area is at the intersection of algebraic geometry, commutative algebra, and combinatorics. Most of the problems I am interested in come from singularity theory.

→ More details about my research area

Publications

Preprints

[1] Partition identities associated with A_r-Surface singularities
with Pooneh Afsharijoo and Pedro D. Gonzålez Pérez
arXiv:2601.12048
[2] On the geometry of punctual Hilbert schemes on singular curves and their motivic zeta functions
with Mounir Hajli and Wenhao Zhu
arXiv:2509.06761
[3] Jet Schemes, Newton Polygons and Continued Fractions
with Ghadi Abdallah, Maximiliano Leyton-Alvarez and Bassam Mourad
arXiv:2509.06095

Published Articles

[4] Classification of singularities of cluster algebras of finite type II: coefficients
with Angélica Benito, Eleonore Faber and Bernd Schober
Journal of Combinatorial Algebra, to appear, DOI 10.4171/JCA/117
Link
[5] Teissier singularities
with Bernd Schober
C. R., Math., Acad. Sci. Paris 363, 799-808 (2025)
arXiv:2502.01239
[6] The Nash problem for torus actions of complexity one
with David Bourqui and Kevin Langlois
J. Reine Angew. Math. 818 (2025), 165-214
PDF
[7] Neighborly partitions, hypergraphs and Gordon's identities
with Pooneh Afsharijoo
J. Combin. Theory Ser. A 210 (2025), Paper No. 105963, 16 pp
arXiv:2309.13334
[8] Hilbert meets Ramanujan: singularity theory and integer partitions
Bull. Amer. Math. Soc. (N.S.) 62 (2025), no. 1, 93-111
PDF
I gave a talk on this topic at the Current Events Bulletin, Joint Mathematics Meetings, San Francisco 2024
đŸŽ„ Watch the video
[9] Groebner fans and embedded resolutions of ideals on toric varieties
with Fuensanta Aroca and Mirna Gomez-Morales
Beitr. Algebra Geom. 65 (2024), no. 1, 217-228
DOI: 10.1007/s13366-023-00684-0
[10] New companions to the Andrews-Gordon Identities motivated by commutative algebra
with Pooneh Afsharijoo, Jehanne Dousse and Frédéric Jouhet
Adv. Math. 417 (2023), Paper No. 108946, 40 pp
arXiv:2104.09422
DOI: 10.1016/j.aim.2023.108946
[11] Resolving singularities of curves with one toric morphism
with Ana Belén de Felipe and Pedro D. Gonzålez Pérez
Mathematische Annalen, 387 (2023), no. 3-4, 1853-1902
Link
[12] Jet schemes and their applications in singularities, toric resolutions and integer partitions
Handbook of geometry and topology of singularities IV, 211-249. Springer, Cham, 2023
PDF
[13] Neighborly partitions and the numerators of Rogers-Ramanujan identities
with Zahraa Mohsen
Int. J. Number Theory 19 (2023), no. 4, 859-872
arXiv:2201.02481
DOI: 10.1142/S1793042123500434
[14] Newton non-degenerate Ό-constant deformations admit simultaneous embedded resolutions
with Maximiliano Leyton-Alvarez and Mark Spivakovsky
Compositio Mathematica, Volume 158, Issue 6, June 2022, pp. 1268-1297
arXiv:2001.10316
DOI: 10.1112/S0010437X22007576
[15] Classification of singularities of cluster algebras of finite type
with Angelica Benito, Eleonore Faber and Bernd Schober
Glasg. Math. J. 65 (2023), no. 1, 170-204
Link
DOI: 10.1017/S0017089522000209
[16] New companions to Gordon identities from commutative algebra
with Pooneh Afsharijoo, Jehanne Dousse and Frédéric Jouhet
Séminaire Lotharingien de Combinatoire 86B.48 (2022)
PDF
[17] On the construction of valuations and generating sequences on hypersurface singularities
with Dale Cutkosky and Bernard Teissier
Algebraic Geometry 8 (6) (2021) 705-748
PDF
DOI: 10.14231/AG-2021-022
[18] Jet schemes of quasi-ordinary surface singularities
with Helena Cobo
Nagoya Math. J. 242 (2021), 77-164
PDF
DOI: 10.1017/nmj.2019.26
[19] The motivic Igusa zeta function of a space monomial curve with a plane semigroup
with Wim Veys and Lena Vos
Advances in Geometry 21 (2021), no. 3, 417-442
PDF
[20] The embedded Nash problem of birational models of rational triple singularities
with Busra Karadeniz, Camille Plénat and Meral Tosun
Journal of Singularities volume 22 (2020), 337-372
PDF
[21] Note on the monodromy conjecture for a space monomial curve with a plane semigroup
with Jorge Martin-Morales, Wim Veys and Lena Vos
C. R. Math. Acad. Sci. Paris 358 (2020), no. 2, 177-187
PDF
[22] Defect and Local Uniformization
with Dale Cutkosky
Rev. R. Acad. Cienc. Exactas Fis. Nat. Ser. A Mat. RACSAM 113 (2019), no. 4, 4211-4226
arXiv:1711.02726
[23] Partition Identities and Application to Infinite Dimensional Groebner Basis and Vice Versa
with Pooneh Afsharijoo
Arc Schemes and Singularities, World Scientific Publishing, pp. 145-161 (2020)
PDF
[24] A polyhedral characterization of quasi-ordinary singularities
with Bernd Schober
Moscow Math. J. 18 (2018), no. 4, 755-785
arXiv:1512.07507
[25] Mather discrepancy as an embedded dimension in the space of arcs
with Ana Reguera
Publ. Res. Inst. Math. Sci. 54 (2018), no. 1, 105-139
PDF
[26] Jet schemes and minimal toric embedded resolutions of rational double point singularities
with Camille Plénat
Comm. Algebra 46 (2018), no. 3, 1314-1332
arXiv:1510.04894
[27] Jet schemes of normal toric surfaces
Bull. Soc. Math. France 145 (2017), no. 2, 237-266
PDF
[28] Jet schemes and generating sequences of divisorial valuations in dimension two
Michigan Math. J., Volume 66, Issue 1 (2017), 155-174
arXiv:1511.03907
[29] Jet schemes of rational double point surface singularities
Valuation Theory in Interaction, EMS Ser. Congr. Rep., Eur. Math. Soc., Sept. 2014, pp: 373-388
PDF
DOI: 10.4171/149-1/18
[30] Jet schemes and minimal embedded desingularization of plane branches
with Monique Lejeune-Jalabert and Ana Reguera
Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas: Volume 107, Issue 1 (2013), Page 145-157
Special issue dedicated to Professor H. Hironaka
PDF
[31] Arc spaces and Rogers-Ramanujan Identities
with Clemens Bruschek and Jan Schepers
The Ramanujan Journal: Volume 30, Issue 1 (2013), Page 9-38
arXiv:1101.4950
[32] Jet schemes of complex plane branches and equisingularity
Annales de l'Institut Fourier, Tome 61, numéro 6 (2011), p. 2313-2336
PDF
[33] Computing Hironaka's invariants: ridge and directrix
with Jeremy Berthomieu and Pascal Hivert
Contemporary Mathematics, vol. 521, Amer. Math. Soc., Providence, RI, 2010, pp. 9-20
PDF
[34] Jet schemes of toric surfaces
C. R. Math. Acad. Sci. Paris 349 (2011), no. 9-10, 563-566
PDF
[35] Arc spaces and Rogers-Ramanujan Identities
with Clemens Bruschek and Jan Schepers
Discrete Mathematics & Theoretical Computer Science Proceedings, FPSAC (2011), 211-220
PDF

Book as Editor

Algebraic Geometry and Number Theory
Edited with Celal Cem Sarioglu, Christophe Soulé, Ayberk Zeytin
Lecture notes of a summer school in Istanbul
Progress in Mathematics, 321. Birkhauser/Springer, Cham, 2017
Cover PDF

Conference Proceedings

Commutative Algebra and Integer Partitions
Oberwolfach Reports, proceedings of the conference Resolutions in Local Algebra and Singularity Theory (2023)
Teissier singularities: a viewpoint on quasi-ordinary singularities in positive characteristics
Oberwolfach Reports. Report 6 (2019)

👹‍🎓 PhD Students

Ghadi Abdallah
Since September 2023 (co-supervised with Bassam Mourad)
Parian Khezerlo
Since September 2023 (co-supervised with Marc Chardin)
Bilal Balo
Since November 2022 (co-supervised with Matteo Ruggiero)
Wenhao Zhu
Punctual Hilbert schemes of irreducible curve singularities
Co-supervised with Mounir Hajli from Jiao Tong University, Shanghai
December 2021 - November 2025
Zahraa Mohsen
Cycles and paths in digraphs, monomial ideals and integer partitions
Co-supervised with Amine El Sahili from Lebanese University
2019-2022
Andrei Bengus-Lasnier
Diskoids and extensions of valuations
2017-2021
Pooneh Afsharijoo
Looking for a new version of Gordon's identities, from algebraic geometry to combinatorics through partitions
2015-2019

Teaching

List of courses I have taught

Teaching in 2023-2024

Probability and Statistics, M1 MEEF
Galois Theory, M1
Elementary Algebra and Analysis, L1 Miashs
Mathematical Reasoning, L1
Mathematics, L1 Computer Science
Mock oral exams, Internal Agrégation

đŸŽ€ Seminars and Working Groups

Co-organized Conferences

Singularities in Plovdiv
June 9-13, 2025, Plovdiv, Bulgaria
Website
Singularities in Paris
September 30 - October 4, 2024, Paris
Website
AMS Special Session on Integer Partitions, Arc Spaces and Vertex Operators, I, II and III
January 3-6, 2024, at Joint Mathematical Meeting, San Francisco
Website
Singularities in Paris
November 21-25, 2022, Paris
Website
Metric Geometry of Singularites
June 2-4, 2021, Paris
Website
Annual Meeting of GDR Singularities and Applications
November 23-27, 2020, Paris
Website
Hilbert schemes, Mckay correspondence and singularities
December 16-18, 2019, Paris
Website
Arc schemes and algebraic group actions
December 2-4, 2019, Paris
Website
Free divisors and Hyperplane arrangements
December 17-19, 2018, Paris
Website
Lipschitz Geometry of Singularites, LISA
May 23-25, 2018, Paris
Website
Deformations and Singularities
December 11-13, 2017, Paris
Website
Theory of valuations
December 4-6, 2017, Paris
Website
Resolution of foliations
October 17-19, 2016, Paris
Website
Two approaches towards local uniformization and resolution of singularities in characteristic p > 0
May 23-27, Mittag-Leffler institute, Stockholm
Website
Young researchers in singularity theory
April 25-29, 2016, Nice
Website
Singularities and Tropical Geometry 2015
October 5-7, 2015, Paris
Website
Singularities and Tropical Geometry 2014
September 29 - October 1, 2014, Paris
Website
Algebraic Geometry and Number Theory
June 2-10, 2014, Istanbul
Website
Metric and variational structures in singular varieties
September 23-27, 2013, Chambéry
Website

Research Groups and Networks

Tropical Aspects of Singularities (SINTROP)
Website
Lipschitz Geometry of Singularities (LISA)
Website
More Invariants From Arc Schemes (MIAS)
Website
Surface Singularities (SUSI)
Website