Blaise Boissonneau
Postdoc in HHU Düsseldorf
Working with Immanuel Halupczok.
Research interests
I did my doctorate on model theory of valued fields, under supervision of Franziska Jahnke. I focus especially on NIPn fields, definability of valuations, and transfer theorems.
Publications
Various notes, not intended for publication
Various non-notes
Talks and slides
Full disclosure, I usually don't do slides. I prefer blackboard talks, as they force a reasonable pace which is easier to follow (at least for me when I'm in the audience of a talk), and they allow much more interactions. We learn through discussion.
Teaching
Classes
Seminars
Oberseminar Algebra und Geometrie, on Groups Definable in o-Minimal Structures, Winter Semester 2025
Seminar on NIP theories, Summer Semester 2025.
Seminar on o-minimality, Winter Semester 2024.
Seminar on Stable Theories, Winter semester 2021; Definability of types, symmetry and stationarity in local stability.
Seminar on Ample Theories, Winter semester 2021; Morley rank, non-forking, canonical bases.
Seminar on O-minimality and the André-Oort Conjecture, Winter semester 2020; Pila’s proof of the André-Oort conjecture (part 1/2).
Seminar on Hrushovski Amalgamation, Summer semester 2020; Ab Initio construction (Part 2/2) (de).
Seminar on Definable groups in metastables theories, Winter semester 2019/20; Geometry of ACVF.
Seminar on Continuous Logic, Summer Semester 2019; Algebraic and definable closures.
Seminar on Simple Theories, Winter Semester 2018/19; Dividing & Forking.
High-school ressources
This content is exclusive to the french version of my website.
Summer schools
e-mail: blaise.boissonneau@hhu.de
About me
As stated, I am working as a postdoc in Düsseldorf. Furthermore, beware; I have political opinions. I enjoy recreational mathematics a lot, so if you have fun puzzles to share, you're very welcome to contact me.
Questions :
The surreal numbers are a (somewhat) explicit monster model of RCF (actually even of Rexp). Are there any other similar explicit monsters?
Nimbers are also an explicit monster model of ACFâ‚‚! Of course from those we can also construct explicit monster models of ACF, RCVF, ACVF... but only in characteristic 0 or 2!
Wait isn't the monster group a monster model of sporadic groups? I am starting to believe that Conway was secretely a model theorist.
Convex polygons which can tile the plane are classified, but it seems that those which can tile the sphere are not yet fully classified, especially when considering non edge-to-edge tilings. Is there a convex polygon which can tile the sphere only in a non edge-to-edge manner?
A 'folklore' result (of which the oldest proof I can find is in Rheinhart's PhD thesis) is that convex polygons tiling the plane can only have 6 sides or less, even when non edge-to-edge. Is there a similar result for polyhedra tiling the 3D space? Regarding their number of faces? Their number of vertices?
In 1934 In his article "A problem in arrangements", M. H. Martin states that "A problem in dynamics, recently considered by the author, gave rise to the following question", the question being the one of existence of what's now called de Bruijn sequences. What problem of fluid dynamics could this possibly be ?
Who is A. de Rivière, who asked the question of de Bruijn sequences first, and why did they ask?
🇵🇸 من النهر إلى البØر 🇵🇸
🇳🇨 Kanaky libre ! Indépendante ! Socialiste ! 🇳🇨
