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The AMS Student Chapter Seminar is an informal, graduate student-run seminar on a wide range of mathematical topics. Pastries (usually donuts) will be provided.
The AMS Student Chapter Seminar (aka Donut Seminar) is an informal, graduate student seminar on a wide range of mathematical topics. The goal of the seminar is to promote community building and give graduate students an opportunity to communicate fun, accessible math to their peers in a stress-free (but not sugar-free) environment. Pastries (usually donuts) will be provided.


* '''When:''' Wednesdays, 3:20 PM – 3:50 PM
* '''When:''' Thursdays 4:00-4:30pm
* '''Where:''' Van Vleck, 9th floor lounge (unless otherwise announced)
* '''Where:''' Van Vleck, 9th floor lounge (unless otherwise announced)
* '''Organizers:''' [https://www.math.wisc.edu/~malexis/ Michel Alexis], [https://www.math.wisc.edu/~drwagner/ David Wagner], [http://www.math.wisc.edu/~nicodemus/ Patrick Nicodemus], [http://www.math.wisc.edu/~thaison/ Son Tu]
* '''Organizers:''' Ivan Aidun, Alex Bonat, Kaiyi Huang, Ethan Schondorf


Everyone is welcome to give a talk. To sign up, please contact one of the organizers with a title and abstract. Talks are 30 minutes long and should avoid assuming significant mathematical background beyond first-year graduate courses.
Everyone is welcome to give a talk. To sign up, please contact one of the organizers with a title and abstract. Talks are 25 minutes long and should avoid assuming significant mathematical background beyond first-year graduate courses.


The schedule of talks from past semesters can be found [[AMS Student Chapter Seminar, previous semesters|here]].
The schedule of talks from past semesters can be found [[AMS Student Chapter Seminar, previous semesters|here]].


== Spring 2019 ==
== Fall 2025 ==


=== February 6, Xiao Shen (in VV B139)===
<center>
 
{| cellspacing="5" cellpadding="14" border="0" style="color:black; font-size:120%"
Title: Limit Shape in last passage percolation
|-
 
| align="center" width="200" bgcolor="#D0D0D0" |'''Date'''
Abstract: Imagine the following situation, attached to each point on the integer lattice Z^2 there is an arbitrary amount of donuts.  Fix x and y in Z^2, if you get to eat all the donuts along an up-right path between these two points, what would be the maximum amount of donuts you can get? This model is often called last passage percolation, and I will discuss a classical result about its scaling limit: what happens if we zoom out and let the distance between x and y tend to infinity.
| align="center" width="200" bgcolor="#A6B658" |'''Speaker'''
 
| align="center" width="300" bgcolor="#BCD2EE" |'''Title'''
=== February 13, TBD ===
| align="center" width="400" bgcolor="#BCD2EE" |'''Abstract'''
 
|-
Title: TBD
| bgcolor="#E0E0E0" | September 11
 
| bgcolor="#C6D46E" | Jacob Wood
Abstract: TBD
| bgcolor="#BCE2FE" | Realizing Matroids
 
| bgcolor="#BCE2FE" | A matroid is a combinatorial object encoding notions of "independence".  For example, given a set of vectors in a vector space, there is an associated matroid encoding which subsets of those vectors are linearly independent of one another.  A matroid arising in this way is called "realizable", but it turns out some abstract matroids cannot be given in this way.  In this talk, I'll introduce matroids and talk about how to find these unrealizable matroids.
=== February 20, TBD ===
|-
 
| bgcolor="#E0E0E0" | September 18
Title: TBD
| bgcolor="#C6D46E" | Sapir Ben-Shahar
 
| bgcolor="#BCE2FE" | More on Matroids
Abstract: TBD
| bgcolor="#BCE2FE" | Essentially a continuation of Jacob's talk from last week, I'll give another perspective on matroids, including talking about other ways in which we can (sometimes) represent them.
 
|-
=== February 27, TBD ===
| bgcolor="#E0E0E0" | September 25
 
| bgcolor="#C6D46E" | Taylor Tan
Title: TBD
| bgcolor="#BCE2FE" | Dispersive Equations
 
| bgcolor="#BCE2FE" | As a model case I will focus on the free Schrodinger in R and the torus and compare the different dispersive behaviors (or lack thereof).
Abstract: TBD
On the line, wave packet spread gives us the expected decay readily.
 
On the tori, the story is more subtle due to constructive interference coming from the major arcs of a quadratic Weyl sum.
=== March 6, TBD ===
This is meant for a general audience, so I will try to give the intuition with pictures.
 
|-
Title: Math and Government
| bgcolor="#E0E0E0" | October 2
 
| bgcolor="#C6D46E" | Dhruv Kulshreshtha
Abstract: TBD
| bgcolor="#BCE2FE" | Reducing the infinite to the finite
 
| bgcolor="#BCE2FE" | Have you ever wondered how many colors are needed to color a countably infinite map? Or why statements that are satisfied by the complex numbers are also satisfied by all algebraically closed fields of sufficiently large prime characteristic?
=== March 13, TBD ===
In this talk, we will explore the Compactness Theorem, which resolves many such interesting questions! No background in logic is necessary.
 
|-
Title: TBD
| bgcolor="#E0E0E0" | October 9
 
| bgcolor="#C6D46E" | -
Abstract: TBD
| bgcolor="#BCE2FE" | -
 
| bgcolor="#BCE2FE" | -
=== March 26 (Prospective Student Visit Day), Multiple Speakers ===
|-
 
| bgcolor="#E0E0E0" | October 16
====Eva Elduque====
| bgcolor="#C6D46E" | -
 
| bgcolor="#BCE2FE" | -
Title: TBD
| bgcolor="#BCE2FE" | -
 
|-
Abstract: TBD
| bgcolor="#E0E0E0" | October 23
 
| bgcolor="#C6D46E" | -
====Rajula Srivastava====
| bgcolor="#BCE2FE" | -
 
| bgcolor="#BCE2FE" | -
Title: TBD
|-
 
| bgcolor="#E0E0E0" | October 30
Abstract: TBD
| bgcolor="#C6D46E" | -
 
| bgcolor="#BCE2FE" | -
====[Insert Speaker]====
| bgcolor="#BCE2FE" | -
 
|-
Title: TBD
| bgcolor="#E0E0E0" | November 6
 
| bgcolor="#C6D46E" | -
Abstract: TBD
| bgcolor="#BCE2FE" | -
 
| bgcolor="#BCE2FE" | -
====[Insert Speaker]====
|-
 
| bgcolor="#E0E0E0" | November 13
Title: TBD
| bgcolor="#C6D46E" | -
 
| bgcolor="#BCE2FE" | -
Abstract: TBD
| bgcolor="#BCE2FE" | -
 
|-
====[Insert Speaker]====
| bgcolor="#E0E0E0" | November 20
 
| bgcolor="#C6D46E" | Emma Hayes
Title: TBD
| bgcolor="#BCE2FE" | An Introduction to My Favorite PDE
 
| bgcolor="#BCE2FE" | TBA
Abstract: TBD
|-
 
| bgcolor="#E0E0E0" | November 27
====[Insert Speaker]====
| bgcolor="#C6D46E" | THANKSGIVING
 
| bgcolor="#BCE2FE" | NONE
Title: TBD
| bgcolor="#BCE2FE" | NONE
 
|-
Abstract: TBD
| bgcolor="#E0E0E0" | December 4
 
| bgcolor="#C6D46E" | -
====[Insert Speaker]====
| bgcolor="#BCE2FE" | -
 
| bgcolor="#BCE2FE" | -
Title: TBD
|}
 
</center>
Abstract: TBD
 
====[Insert Speaker]====
 
Title: TBD
 
Abstract: TBD
 
====[Insert Speaker]====
 
Title: TBD
 
Abstract: TBD
 
=== April 3, Hyun-Jong ===
 
Title: TBD
 
Abstract: TBD
 
=== April 10, TBD ===
 
Title: TBD
 
Abstract: TBD
 
=== April 17, TBD ===
 
Title: TBD
 
Abstract: TBD
 
=== April 24, TBD ===
 
Title: TBD
 
Abstract: TBD

Latest revision as of 18:33, 29 September 2025

The AMS Student Chapter Seminar (aka Donut Seminar) is an informal, graduate student seminar on a wide range of mathematical topics. The goal of the seminar is to promote community building and give graduate students an opportunity to communicate fun, accessible math to their peers in a stress-free (but not sugar-free) environment. Pastries (usually donuts) will be provided.

  • When: Thursdays 4:00-4:30pm
  • Where: Van Vleck, 9th floor lounge (unless otherwise announced)
  • Organizers: Ivan Aidun, Alex Bonat, Kaiyi Huang, Ethan Schondorf

Everyone is welcome to give a talk. To sign up, please contact one of the organizers with a title and abstract. Talks are 25 minutes long and should avoid assuming significant mathematical background beyond first-year graduate courses.

The schedule of talks from past semesters can be found here.

Fall 2025

Date Speaker Title Abstract
September 11 Jacob Wood Realizing Matroids A matroid is a combinatorial object encoding notions of "independence".  For example, given a set of vectors in a vector space, there is an associated matroid encoding which subsets of those vectors are linearly independent of one another.  A matroid arising in this way is called "realizable", but it turns out some abstract matroids cannot be given in this way.  In this talk, I'll introduce matroids and talk about how to find these unrealizable matroids.
September 18 Sapir Ben-Shahar More on Matroids Essentially a continuation of Jacob's talk from last week, I'll give another perspective on matroids, including talking about other ways in which we can (sometimes) represent them.
September 25 Taylor Tan Dispersive Equations As a model case I will focus on the free Schrodinger in R and the torus and compare the different dispersive behaviors (or lack thereof).

On the line, wave packet spread gives us the expected decay readily. On the tori, the story is more subtle due to constructive interference coming from the major arcs of a quadratic Weyl sum. This is meant for a general audience, so I will try to give the intuition with pictures.

October 2 Dhruv Kulshreshtha Reducing the infinite to the finite Have you ever wondered how many colors are needed to color a countably infinite map? Or why statements that are satisfied by the complex numbers are also satisfied by all algebraically closed fields of sufficiently large prime characteristic?

In this talk, we will explore the Compactness Theorem, which resolves many such interesting questions! No background in logic is necessary.

October 9 - - -
October 16 - - -
October 23 - - -
October 30 - - -
November 6 - - -
November 13 - - -
November 20 Emma Hayes An Introduction to My Favorite PDE TBA
November 27 THANKSGIVING NONE NONE
December 4 - - -
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