Date  Speaker  Title 

Rods and Balls: Liquid Crystals of Different Lengths  
Rodlike polymers are frequently encountered in nature, and understanding their physical properties is key to understanding their biological  
Effects of Blood Flow Distribution on Oxygen Delivery in a Heterogeneous Microvascular Network 

Due to its relatively low solubility in tissue, oxygen can only diffuse a short distance into oxygenconsuming tissue. Thus, oxygen levels in  
The 27 Lines on a Cubic Surface 

Every smooth
cubic surface in CP^3 contains exactly 27 lines. I will explain
what these have to do with blowing up CP^2 at 6 sufficiently general points, and will elaborate on the relation between the coordinates of the points and the equation of the cubic surface. Surprisingly, this will involve an elliptic curve over a function field, and the minimal roots of a lattice.  
GTEAMS and You 

The GTEAMS program provides an innovative and dynamic opportunity for graduate students and teacher partners to collaborate on the  
 
Introduction to nonEuclidean plates 

The wavelike patterns observed in leaves, flowers, mushrooms, sea
slugs, lichen, and even dresses is caused by simple lateral differential
growth of the tissue/cloth. A recent model of this phenomenon, based on the classic theory of large deflection in elastic plates, proposes that the equilibrium configuration taken is one that minimizes a Föppl  von Kąrmąn type energy functional with the stretching energy measured by deviations away from a fixed target Riemannian metric. In this talk we present a study of this functional in the small thickness regime when the Gaussian curvature is constant and negative.  
Using Newton's second
law, a small particle in fluid is modeled by a secondorder stochastic
differential equation. For negligible mass, the SmoluchowskiKramers approximation is valid but may change depending on how the limit of the mass goes to zero. The limit is studied in applications to homogenization and large deviations. We note that the fluctuationdissipation theorem in thermodynamics complicates the limit. However, the SmoluchowskiKramers approximation can be derived using PDE theory to find the equation the Brownian particle obeys.  


 
Whether one can hear the shape of a drum is one of the more popular problems in modern mathematics. It was inspired by Mark Kac in his famous 1966 paper where he pondered if the shape of a domain could be determined by the eigenvalues of the Dirichlet Lapacian. While it has been disproven in many cases, there are many related problems still being investigated from various points of view. A central theme to all such work is the formula of Weyl, which relates the number of eigenvalues of the Dirichlet Laplacian on a bounded domain to its volume. In this talk, I will give an introduction to unbounded operators and DirichletNeumann bracketing to setup a sketch of a proof of Weyl's formula.  
March 30 
Yuliya Gorlina 

In
this talk, I will summarize my dissertation research, including some of
my results. I will start with an accessible introduction of
geometric triangulations. Please come and give me feedback to help me write the talk for my defense.  
Sarah Mann 

In
this talk, I will discuss computability, the ChurchTuring thesis,
Turing machines, and other methods of computation such as tag systems,
glider systems, and cellular automata. This talk will be accessible to everyone; no background in computer science will be assumed.  
A stock option is a contract to purchase or sell shares of stock for a
fixed price K at some time N in the future. How much is the option
worth at time t=0? One way to price an option is through the celebrated BlackScholes formula. I will present the discretetime analogue of BlackScholes. Applications include how to simultaneously get unimaginably rich while everyone around you is put in the poor house, kind of like the movie Trading Places.  
Maximal Subgroups of the Finite Classical Groups and Representations 

A
theorem by Aschbacher provides a link between studying maximal
subgroups of the finite classical groups and studying the behavior under restriction of irreducible representations of its subgroups. The goal of my talk (aside from eating bagels) is to explain this statement and give some insight into my current research on the subject.  
Certain
modular forms have a Fourier expansion with very nice properties.
These forms, call Hecke eigenforms, have multiplicative Fourier coefficients. Occasionally the product of two eigenforms is again an eigenform. We will discuss this phenomenon and how often it occurs. For the full group SL_2(Z) there are 16 (classically known) product identities, all forced by dimensional considerations. For modular forms on Gamma_1(N) with certain weights we prove that there are only a finite number of such product identities. The Valenzetti equation will be discussed if time permits.  
Given a set of
rational points on an elliptic curve, one may employ the classical
tangentchord process to produce yet more rational points. Question: How many rational points must one begin with in order to produce all of the rational points on a given elliptic curve? The MordellWeil Theorem provides a partial answer: $E(K)$ is finitely generated for any number field $K$. The proof of the theorem involves two main parts: Descent Theorem on Heights and the Weak MordellWeil Theorem. In this talk, we will concentrate on the latter, which states that $E(K)/mE(K)$ is finitely generated. In particular, I will introduce some basic group cohomology and give an outline of the proof via Galois cohomology. 
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