### TBA by Anthony Sanchez

- Series
- CDSNS Colloquium
- Time
- Friday, September 6, 2024 - 15:30 for 1 hour (actually 50 minutes)
- Location
- TBA
- Speaker
- Anthony Sanchez – University of California - San Diego – ans032@ucsd.edu

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- Series
- CDSNS Colloquium
- Time
- Friday, September 6, 2024 - 15:30 for 1 hour (actually 50 minutes)
- Location
- TBA
- Speaker
- Anthony Sanchez – University of California - San Diego – ans032@ucsd.edu

- Series
- Combinatorics Seminar
- Time
- Friday, September 6, 2024 - 15:15 for 1 hour (actually 50 minutes)
- Location
- Skiles 005
- Speaker
- Shengtong Zhang – Stanford University – stzh1555@stanford.edu

- Series
- Stochastics Seminar
- Time
- Thursday, September 5, 2024 - 15:30 for 1 hour (actually 50 minutes)
- Location
- Skiles 006
- Speaker
- Will Perkins – Georgia Tech

- Series
- Combinatorics Seminar
- Time
- Friday, August 30, 2024 - 15:15 for 1 hour (actually 50 minutes)
- Location
- Skiles 005
- Speaker
- Cheng Mao, Josephine Yu, Tantan Dai – Georgia Tech

Three fifteen-minute talks by local speakers.

- Series
- Graph Theory Seminar
- Time
- Tuesday, August 27, 2024 - 15:30 for 1 hour (actually 50 minutes)
- Location
- Skiles 005
- Speaker
- Rose McCarty – Georgia Tech

- Series
- Combinatorics Seminar
- Time
- Friday, August 23, 2024 - 15:15 for 1 hour (actually 50 minutes)
- Location
- Skiles 005
- Speaker
- Candy Bowtell

- Series
- Graph Theory Seminar
- Time
- Tuesday, July 23, 2024 - 15:30 for 1 hour (actually 50 minutes)
- Location
- Skiles 005
- Speaker
- Xiangqian Joseph Zhou – Wright State University – xiangqian.zhou@wright.edu

A matroid $M$ is a pair $(E, \mathcal{I})$ where $E$ is a finite set, called the {\em ground set} of $M$, and $\mathcal{I}$ is a non-empty collection of subsets of $E$, called {\em independent sets} of $M$, such that (1) a subset of an independent set is independent; and (2) if $I$ and $J$ are independent sets with $|I| < |J|$, then exists $x \in J \backslash I$ such that $I \cup \{x\}$ is independent.

A graph $G$ gives rise to a matroid $M(G)$ where the ground set is $E(G)$ and a subset of $E(G)$ is independent if it spans a forest. Another example is a matroid that comes from a matrix over a field $F$: the ground set $E$ is the set of all columns and a subset of $E$ is independent if it is linearly independent over $F$.

Tutte's Wheel and Whirl Theorem and Seymour's Splitter Theorem are two well-known inductive tools for proving results for 3-connected graphs and matroids. In this talk, we will give a survey on induction theorems for various versions of 4-connected matroids and graphs.

- Series
- Geometry Topology Seminar
- Time
- Monday, July 22, 2024 - 14:00 for 1 hour (actually 50 minutes)
- Location
- Skiles 006
- Speaker
- Rima Chatterjee – University of Cologne

A fundamental result in 3-dimensional contact topology due to Ding-Geiges tells us that any contact 3-manifold can be obtained via doing a surgery on a Legendrian link in the standard contact 3-sphere. So it's natural to ask how simple or complicated a surgery diagram could be for a given contact manifold? Contact surgery number is a measure of this complexity. In this talk, I will discuss this notion of complexity along with some examples. This is joint work with Marc Kegel.

- Series
- Time
- Thursday, July 18, 2024 - 11:00 for 3 hours
- Location
- Skiles Atrium
- Speaker

The annual School of Math REU summer poster session will take place 11-2 on Thursday July 18th in the Skiles Atrium. We have a group of more than 20 students presenting projects on a variety of subjects (info for most of the projects available here). There will also be some light snacks and coffee etc. Come by and see the hard work that the students have done this summer; the students will certainly appreciate your interest!

- Series
- Job Candidate Talk
- Time
- Tuesday, July 2, 2024 - 11:00 for 1 hour (actually 50 minutes)
- Location
- ONLINE
- Speaker
- Harold Blum – University of Utah

Algebraic geometry is the study of shapes defined by polynomial equations called algebraic varieties. One natural approach to study them is to construct a moduli space, which is a space parameterizing such shapes of a given type (e.g. algebraic curves). After surveying this topic, I will focus on the problem of constructing moduli spaces parametrizing Fano varieties, which are a class of positively curved complex manifolds that form one of the three main building blocks of varieties in algebraic geometry. While algebraic geometers once considered this problem intractable due to various pathologies that occur, it has recently been solved using K-stability, which is an algebraic definition introduced by differential geometers to characterize when a Fano variety admits a Kähler-Einstein metric.