Raphaël Henry

I am a PhD student in combinatorics under the supervision of Nicolas Bédaride and Étienne Moutot in the GDAC team of I2M, at Aix-Marseille Université.

Research :

My main subject of interest is symbolic dynamics/combinatorics on words. More precisely, I study words arising from substitutions and I have several considerations:

The factor complexity, mostly in 1D, sometimes in 2D
Minimality and ergodic measures for substitution subshifts
Decidability and computability related to these problems

I also have to mention the problem that brought me to combinatorics on words and still inspires me today: the Oldenburger-Kolakoski sequence.

Publications :

24/06/2024 Morphic Sequences: Complexity and Decidability (Conference Proceedings)
31/01/2025 On the minimal components of substitution subshifts (Preprint)

Talks :

09/11/2023 Séminaire doctorants, Luminy
27/03/2024 Séminaire doctorants, Marseille
29/05/2024 Journées SDA2, Orléans
27/06/2024 GASCOM, Bordeaux
02/07/2024 Groupe de travail Porkroll, Porquerolles
06/09/2024 Journées Montoises d'informatique théorique, Nice
23/10/2024 Séminaire doctorants, Marseille
29/05/2025 Combinatorics on Words workshop, Janov nad Nisou
05/06/2025 Séminaire d'équipe, Liège
16/06/2025 EJCIFM, Caen
07/07/2025 Dyadisc, Amiens

Teaching :

Mathematics :

2023-2024
- Analyse (L1 Portail Descartes Aix)
- Algèbre linéaire (L1 Portail Descartes Aix)
2024-2025
- Polynômes (L2 Maths)

Computer Science :