Education

Background

2023-2026. Ph.D in Theoretical Computer Science, LIS, Aix-Marseille Université
- Title: On the Computations of Homological Holes: where topology, geometry and combinatorics meet. Manuscript and slides.
- under the supervision of Alexandra BAC and Aldo GONZALEZ-LORENZO
- defended on October 7th 2026
2019-2021. Master degree in Theoretical Computer Science, ENS de Lyon
co-accredited with ID3D (computer graphics master degree), UCBL1, Lyon
2018-2019. Bachelor degree in Theoretical Computer Science, ENS de Lyon
2016-2018. Classes préparatoires aux grandes écoles, MPSI, MP*, Lycée du Parc, Lyon
2016. Baccalauréat scientifique - sciences de l’ingénieur, Lycée Dhuoda, Nîmes

Research Internships

Spring 2023 (5 months). GENEOS theory and Generalized Persistence
- with Patrizio FROSINI and Massimo FERRI, Bologna (Italia)
Fall 2022 (5 months). Computing Geometrical Measures of Topological Holes
- with Alexandra BAC and Aldo GONZALEZ-LORENZO, LIS, Marseille (France)
Spring 2021 (5 months). Measuring the Holes of 3D Meshes
- with Alexandra BAC and Aldo GONZALEZ-LORENZO, LIS, Marseille (France)
Spring 2020 (3 months). Constraint Automatic Instantiation for Color Palettes
- with Nicolas MELLADO and David VANDERHAEGHE, IRIT, Toulouse (France)
Fall 2019 (4 months in partial time). Reconstruction Géométrique Interactive dans l’Espace Digital
- with Srečko BRLEK, LACIM, Montreal (Canada)
Spring 2019 (6 weeks). Echantillonnage Rapide de Surfaces 3D in the Wild
- with David COEURJOLLY, LIRIS, Lyon (France)

Skills

Programming: C, C++ (in particular CGAL library), Python, Ocaml, GDscript, Latex, Bash, GLSL.
Languages: French (native), English (C1), Italian (elementary), Spanish (elementary), Mina (elementary)

Publications

Characterization of the Homology and Cohomology Bases Computed by Standard Methods

Yann-Situ Gazull, Aldo Gonzalez-Lorenzo, Alexandra Bac, "Characterization of the Homology and Cohomology Bases Computed by Standard Methods." Journal of Mathematical Imaging and Vision, 2026.

Stability and extension of steady and ranging persistence

Yann-Situ Gazull, "Stability and extension of steady and ranging persistence." Journal of Applied and Computational Topology, 2025.

On the Graph of Homology Computations and its Connectedness

Yann-Situ Gazull, Aldo Gonzalez-Lorenzo, Alexandra Bac, "On the Graph of Homology Computations and its Connectedness." preprint, 2025.

Characterization of the Computed Homology and Cohomology Bases

Yann-Situ Gazull, Aldo Gonzalez-Lorenzo, Alexandra Bac, "Characterization of the Computed Homology and Cohomology Bases." Proceedings of International Conference on Discrete Geometry and Mathematical Morphology, 2025.

A constructive approach of Alexander duality

Aldo Gonzalez-Lorenzo, Alexandra Bac, Yann-Situ Gazull, "A constructive approach of Alexander duality." Journal of Applied and Computational Topology, 2024.

Computing Geometrical Measures of Topological Holes

Yann-Situ Gazull, Alexandra Bac, Aldo Gonzalez-Lorenzo, "Computing Geometrical Measures of Topological Holes." Computer-Aided Design, 2023.

Talks

Conferences and Workshops

GTMG 2026. Paris (Jussieu). March 2026.
Presentation: Experiments on the Space of Homology Computations, presented with Menjatiana Andrianabinitsoa.
DGMM 2025. Gröningen, Nederland. November 2025.
Presentation: Characterization of the Computed Homology and Cohomology bases.
CGAL Days. Sophia Antipolis. April 2025.
Presentation: Homological Discrete Vector Fields… 1 year later…, presented with Alexandra Bac.
GTMG 2025. Poitiers. March 2025.
Presentation: Ongoing Works about Homology Configurations, best presentation award.
Geometry and Computing. Marseille (CIRM). October 2024.
Presentation: A Versatile Tool for Computing and Understanding Homology.
R-GTMG. Marseille (CIRM). March 2024.
Presentation: A Constructive Approach to Alexander Duality.
SPM 2023. Genova, Italia. July 2023.
Presentation: Computing Geometrical Measures of Topological Holes, second best paper award.
GTMG 2021. Online. March 2021.
Presentation: Measuring Holes of 3D Meshes, best student presentation award.

Seminars

Topocs Seminars (topology in computer science). Marseille (LIS). May, June and November 2025.
- Presentation: Structures in Combinatorial Homology.
- Presentation: A Constructive Approach to Alexander Duality.
- Presentation: Homology Configurations.
Demi-journée du Pôle Calcul. Marseille (LIS). December 2022.
Presentation: Étude d’Objets Homologiques Computationnels.

Teaching

2023-2026. Optimisation - main teacher
- for M1 (first year of master degree) computer science engineering students
- Lecture courses + practical tutorials + exams
- Polytech Marseille
2023-2025. Algorithmic - teaching assistant
- for L3 (third year of bachelor degree) computer science engineering students
- practical tutorials
- Polytech Marsielle

Other Working Experiences

2022. Creation of an architectural 3D printer - programmer
- programming of the firmware, Auroville (India),
- volunteering of 2 months
2020. painting courses - volunteer teacher
- association Art et développement, Lyon.
2017. scientific tutor
- mathematics, physics, middle school level, collège Les Iris, Villeurbanne.
2014-2017: Animator in a recreational center
- children between 5 and 11 years old
- with complete BAFA diploma
Volunteering for artistic festivals
- Peinture fraîche éditions 2020 et 2021 (Lyon)
- Expo de ouf (Nîmes)
- Karnaval Humanitaire (Villeurbanne)
- …

Other Activities

Drawing and painting, with different techniques. See here.
Playing go (baduk in Korean, weiqi in Chinese). I am a member of the Sardin Ki’in and a former member of Bologna go club. See my rating.
Juggling, mainly passing with clubs. I owe a lot to Extrême Jonglerie.
Video game creation: graphics, programming, music…
Music (currently playing timbal in the Muleketu batucada), improvisation acting, crochet…