# Mathematics Department

###### Geometry/topology Seminar

##### Chao Li (Princeton University, Mathematics)

**Monday, September 21 - 3:15 pm**

**Zoom link**

It has been a classical question which manifolds admit Riemannian metrics with positive scalar curvature. I will present some recent progress on this question, ruling out positive scalar curvature on...

###### Graduate-Faculty Talks

##### Margaret Regan (Duke, Math)

**Monday, September 21 - 4:30 pm**

**Zoom**

Many problems that arise in mathematics, science, and engineering can be formulated as solving a parameterized system of polynomial equations which must be solved for given instances of the parameters...

###### Probability Seminar

##### Alex Hening (Tufts)

**Thursday, September 24 - 3:15 pm**

**Zoom link**

A key question in population biology is understanding the conditions under which the species of an ecosystem persist or go extinct. Theoretical and empirical studies have shown that persistence can be...

###### Mathematical Biology Seminar

##### Alexandria Volkening (Northwestern University, NSF–Simons Center for Quantitative Biology; Engineering Sciences & Applied Mathematics)

**Friday, September 25 - 12:00 pm**

**Online**

Wild-type zebrafish (Danio rerio) are characterized by black and yellow stripes, which form on their body and fins due to the self-organization of thousands of pigment cells. Mutant zebrafish and...

###### Frontiers In Mathematics Distinguished Lecture Series (Lecture 2)

##### Hong Wang (IAS)

**Friday, September 25 - 12:00 pm**

**Physics 119**

If \(\mathbb{T}\) is a collection of distinct tubes of length \(N\), radius 1 and \(P\) is a collection of disjoint unit balls, what is the largest size of their incidences \(I(P, \mathbb{T})=\{(p, T...

###### Graduate Faculty Seminar Seminar

##### Yiming Zhong (Duke, Math)

**Monday, September 28 - 4:45 pm**

**Zoom**

TBA

###### Applied Math And Analysis Seminar

##### Cole Graham (Stanford)

**Tuesday, September 29 - 3:15 pm**

**Physics 119**

###### Probability Seminar

##### Zoe Haung (Duke, math)

**Thursday, October 1 - 3:15 pm**

**Zoom link**