[Topology.beta] AG 2025!

[Rot, T.O. (Thomas)]

Dear all,

Best wishes for 2025! A couple of things:

I am happy to announce that Aaron Gootjes-Dreesbach is speaking next week Tuesday 11:00 in the AG in our seminar room. Title and abstract below.

My plan is to organize the AG again this year. For this I am looking for speakers.

For PhD’s/postdocs/staff:

We want to have speakers.


  *   Let me know if you have guests. We can always rearrange the schedule of internal speakers.
  *   Let me know if you want me to invite people (e.g. graduating phd students from the Netherlands)

As it has been a while that we talked about our own interests, I think it is good to do a cycle. Do you want to speak in the seminar? Please let me know. Possible ideas for topics:


  *   Your own research
  *   A paper that you read about that you liked
  *   A cool mathematical fact that you always wanted to share.

I strongly encourage all PhD’s to talk!

Talks don’t have to be fully polished, and results can be in progress. This can be a nice avenue to get some early feedback.

Please have a look at the schedule on my site. Please volunteer on a Tuesday that is not taken yet

https://www.few.vu.nl/~trt800/arbeitsgemeinschaft.html

Best,
Thomas

14-01-2025 Aaron Gootjes-Dreesbach
Jet configuration spaces and weightings
Blowing up the diagonal of $M^2$ for a manifold $M$ yields a configuration space that remembers the collision axis of collided configurations. Fulton and MacPherson famously generalized this construction to configurations of more than two points. In joint work with A. del Pino, we build configuration spaces for jets of maps $M\to N$ in the same spirit, but adapted to the main structure on jet space: The Cartan distribution and the Lie filtration it generates. Higher jet orders necessitate the use of \textit{weighted} blow-ups, which we tackle within the recent differential-geometric framework of \textit{weightings} due to Loizides and Meinrenken. In this talk, I first intuitively illustrate this motivation and our construction. I will then give an introduction to weightings and discuss how we use them as far as time allows.





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