How do we parametrize a random fractal curve?

Speaker: 

Greg Lawler

Institution: 

University of Chicago

Time: 

Friday, February 24, 2017 - 2:00am to 3:00am

Host: 

Location: 

NS2 1201

For a smooth curve, the natural paraemtrization

is parametrization by arc length.  What is the analogue

for a random curve of fractal dimension d?  Typically,

such curves have Hausdorff dmeasure 0.  It turns out

that a different quantity, Minkowski content, is the

right thing.   

 

I will discuss results of this type for the Schramm-Loewner

evolution --- both how to prove the content is well-defined

(work with M. Rezaei) and how it relates to the scaling

limit of the loop-erased random walk (work with F. Viklund

and C. Benes).

Slopes of L-functions of Z_p-covers of the projective line

Speaker: 

Michiel Kosters

Institution: 

UCI

Time: 

Tuesday, February 21, 2017 - 2:00pm to 3:00pm

Location: 

RH 340P

Let P: ... -> C_2 -> C_1 -> P^1 be a Z_p-cover of the projective line over a finite field of characteristic p which ramifies at exactly one rational point. In this talk, we study the p-adic Newton slopes of L-functions associated to characters of the Galois group of P. It turns out that for covers P such that the genus of C_n is a quadratic polynomial in p^n for n large, the Newton slopes are uniformly distributed in the interval [0,1]. Furthermore, for a large class of such covers P, these slopes behave in an even more regular way. This is joint work with Hui June Zhu.

Introduction to limiting absorption principle and its application to spectral theory

Speaker: 

Wencai Liu

Institution: 

UC Irvine

Time: 

Friday, February 3, 2017 - 1:00pm to 1:50pm

Location: 

RH 510M

My goal is to prove Agmon theorem in two talks. In the first talk, I will use the limiting absorption principle for the free Laplacian to prove Agmon theorem. Next Friday, Lili Yan will present the limiting absorption principle for free Laplacian.

 

Random Matrix Products

Speaker: 

Anton Gorodetski

Institution: 

UC Irvine

Time: 

Friday, April 28, 2017 - 4:00pm

Location: 

MSTB 124

Let us take a couple of 2x2 matrices A and B, and consider a long product of matrices, where each multiplier is either A or B, chosen randomly. What should we expect as a typical norm of such a product? This simple question leads to a rich theory of random matrix products. We will discuss some of the classical theorems (e.g. Furstenberg Theorem), as well as the very recent results. 

Peer observation of teaching

Speaker: 

Chris Davis

Institution: 

UC Irvine

Time: 

Friday, April 14, 2017 - 4:00pm

Location: 

MSTB 124

Peer observation of teaching is an excellent way to receive concrete, fact-based feedback on what it's like in your classroom.  This spring quarter the math department will run peer observation among 1st and 2nd year grad students, and this meeting will introduce that.  It is also open to more advanced grad students.  In particular, any student eventually needing a teaching-focused letter of recommendation (which is required for almost all postdocs) is strongly encouraged to attend this session.  Our set-up will be based on Danny Mann's talk in fall quarter.

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