## SIAM Chapter Seminar

Get to know what your fellow Ph.D students are working on!

Time: 28.09.22 at 4pm

Place: house 9, room 1.22. Details are announced via mailing list "SIAM-chapter-list", or ask Franziska or Florian.

Speaker: Florian Fischer

Topic: Optimal $$p$$-Hardy Weights on Locally Finite Graphs

Abstract: A natural classification of random walks is the one into recurrent and transient ones. This is equivalent to the non-/validity of the Hardy inequality for the energy functional associated with the Laplace operator on the graph. The latter is an abstract inequality between functionals and can be generalised further. In this talk, we discuss a generalisation to the quasi-linear setting and show a method to get optimal Hardy weights. We illustrate this method on the natural numbers and on regular trees. If the time permits, we also discuss  characterisations of having a Hardy inequality.

## Social Event

we are happy to invite you to our next SIAM social event next Wednesday, 27th of June at 4pm. Like last time, we will meet at the ping-pong tables behind house 11. In case of rain, we will meet in the coffee room in house 9 (room 2.09.2.10).

A plan of Golm campus is provided here:  https://www.uni-potsdam.de/en/adressen/overview

We hope to see you at the seminar!

## Potsdam SIAM Student Chapter

We are happy to announce that we founded a SIAM Student Chapter in Potsdam in February 2021. See here for general information about SIAM student chapters.

The Student Chapter is an association of students at the University of Potsdam.

What are the benefits of being organised as a SIAM Student Chapter?

• student members of the Chapter can get free SIAM membership
• networking and collaboration opportunities with other Chapters
• funded participation in SIAM Annual Meetings
• funding for local activities like lunch discussions or lectures by guest speakers

Who can become a member?

• the chapter is open to everyone who is interested
• we especially encourage Master's students and PhD students to join

How to become a member?

• subscribe to our mailing list here: subscribe to our mailing list here or join one of our meetings
• there are no costs or duties for members.

General information:

• President: Florian
• Vice-President: Franziska
• Secretary: Guiseppe
• Tresurer: Josie
• You want to stay up to date? Then subscribe to our mailing list here.

If you have any questions feel free to ask the PhD representatives Undine and Florian. The faculty advisor of this Chapter is Prof. Dr. Melina Freitag.

## Previous Events

### SIAM SLAM

Can you summarize the content of your research in 3 minutes? Can you do it in an entertaining way? Then our SIAM Slam might be for you!

As a joint initiative of our SIAM Chapter and the SIAM Chapters of Aachen, Heidelberg and Magdeburg, we would like to invite you to SIAM Slam. There, different participants will present their theses or other scientific findings in a very short amount of time. The audience will choose the most entertaining and informative presentation.

The event will take place via zoom on the 10th of June at 18:00. Feel free to ask Florian for the login data.

Each participant will have exactly 3 minutes for their presentation. A slideshow is allowed, however, we advise reducing the number of slides. There will be a prize for the best presentation.

If you just want to be a spectator, you are welcome to join as well. Then, no registration is needed. In the second part of the event, we will run a short quiz based on the presentations. Here, the winner will also get a small prize. We plan to close the event with an opportunity to together play games online.

If you always wanted to try your hand at being a science communicator, this is your time. Who knows, maybe you are the next Richard Feynman or Stephen Hawking? :)