All Events

from Tuesday
October 17, 2017 to Sunday
December 31, 2017
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Instructions for subscribing to Stony Brook Math Department Calendars

 Month     Agenda 

Tuesday
October 17, 2017

4:00 PM - 5:00 PM
Math Tower P-131
Geometry/Topology Seminar
Jiyuan Han, UW-Madison
On closedness of ALE SFK metrics on minimal ALE Kahler surfaces

For certain cases with some topological assumption that gives the boundedness of Sobolev constant, we construct the space of ALE SFK metrics on minimal ALE Kahler surfaces asymptotic to C^2/G, where G is a finite subgroup of U(2). This is a joint work with Jeff Viaclovsky.


Wednesday
October 18, 2017

4:00 PM
Math Tower 5-127
Analysis Student Seminar
Edward Bryden, Stony Brook University
TBA


Wednesday
October 18, 2017

1:00 PM
Math Tower 4-130
Math Club
Arie Hinkis,
How can mathematical proofs be compared ?

The Cantor-Bernstein Theorem received the attention of over forty proofs in the first hundred years since it was formulated. We offer a method for the comparison of these proofs. The method reveals a general pattern for the discovery of proofs in mathematics. We draw attention to the inner history of mathematics regarding the seminal work of Denes Koenig on the theory of graphs and mention in passing several historical anecdotes.


Wednesday
October 18, 2017

4:00 PM - 5:00 PM
Math Tower P-131
Algebraic geometry seminar
Harold Blum, U. Michigan, Ann Arbor
Valuations, Singularities, and K-stability

Let L be a line bundle on a projective variety X. We use valuations to measure the singularities of the linear system |mL| as m goes to infinity.
Specifically, we consider the global log canonical threshold, also known as Tian’s alpha invariant, and the stability thresholds of L. The stability threshold generalizes an invariant recently introduced by Kento Fujita and Yuji Odaka. When X is a Fano variety, we show that the stability threshold detects the K-(semi)stability of X. This talk is based on joint work with Mattias Jonsson.


Wednesday
October 18, 2017

1:00 PM - 2:00 PM
Math Tower P-131
Graduate Student Seminar
John Sheridan, Stony Brook University
TBA

TBA


Thursday
October 19, 2017

4:00 PM - 5:00 PM
Math Tower P-131
Colloquium
Alex Gamburd, CUNY Graduate Center
Arithmetic and Dynamics on Markoff-Hurwitz Varieties

Markoff triples are integer solutions of the equation $x^2+y^2+z^2=3xyz$ which arose in Markoff's spectacular and fundamental work (1879) on diophantine approximation and has been henceforth ubiquitous in a tremendous variety of different fields in mathematics and beyond. After reviewing some of these, we will discuss joint work with Bourgain and Sarnak on the connectedness of the set of solutions of the Markoff equation modulo primes under the action of the group generated by Vieta involutions, showing, in particular, that for almost all primes the induced graph is connected. Similar results for composite moduli enable us to establish certain new arithmetical properties of Markoff numbers, for instance the fact that almost all of them are composite.
Time permitting, we will also discuss recent joint work with Magee and Ronan on the asymptotic formula for integer points on Markoff-Hurwitz surfaces $x_1^2+x_2^2 + \dots + x_n^2 = x_1 x_2 \dots x_n$, giving an interpretation for the exponent of growth in terms of certain conformal measure on the projective space.


Friday
October 20, 2017

2:30 PM - 3:30 PM
Math Tower P-131
Dynamical Systems Seminar
Yury Kudryashov, Cornell University
Bifurcations of planar vector fields

In 1985 V. Arnold stated six problems aimed to outline the future development of the global bifurcation theory in the plane. In particular, he conjectured that a generic finite-parametric family of vector fields on the two-sphere is structurally stable. Recently Yulij
Ilyashenko, Ilya Schurov and I disproved this conjecture [1]. It turns out that 3-parametric families of vector fields may have numerical invariants of (moderate) topological classification, and 6-parametric families may have functional invariants.

I will discuss the main construction of [1], then I'll give a survey of the results obtained by Yu. Ilyashenko and his students N. Goncharuk, me, I. Schurov, N. Solodovnikov, V. Starichkova.

I will also discuss some ongoing research in this field that may lead to many independent numerical invariants of the 3-parametric family of vector fields constructed in [1].

[1]: http://arxiv.org/abs/1506.06797


Tuesday
October 24, 2017

5:25 PM - 6:30 PM
Math Tower 5-127
First and Second Year Student Seminar
Panel discussion, Stony Brook University
Prepare qual/comps

We will hold a discussion session with Ben Wu, Tobias Shin, Liz Hernandez Vazquez, and Aleksandar Milivojevic about preparing/taking qual/comps.


Tuesday
October 24, 2017

4:00 PM - 5:30 PM
Math Tower P-131
Geometry/Topology Seminar
Mark Haskins, University of Bath
Codimension One Collapse and Special Holonomy Metrics

In this talk we describe recent developments related to codimension one collapse of exceptional holonomy metrics. i.e. where a family of special holonomy metrics on a space of dimension n converges in some limit to a metric on a space of dimension n-1. Interesting examples occur for hyperkaehler 4-manifolds, G_2 holonomy manifolds and Spin_7 holonomy manifolds. The talk will focus on the G_2 holonomy case, but will also draw on the better understood hyperkaehler case for inspiration and for useful analogies. These mathematical developments are closely related to important limits in physics, e.g. in the context of G_2 holonomy metrics it is related to the identification of the weak coupling limit of M theory compactified on a G_2 holonomy space being Type IIA String Theory on a 6-dimensional space. This is work joint with Lorenzo Foscolo and Johannes Nordstrom.


Wednesday
October 25, 2017

4:00 PM - 5:30 PM
Math Tower P-131
Algebraic geometry seminar
Sebastian Casalaina-Martin, U. of Colorado,. Boulder
TBA

TBA


Wednesday
October 25, 2017

1:00 PM - 2:00 PM
Math Tower P-131
Graduate Student Seminar
Yoon-Joo Kim, Stony Brook University
TBA

TBA


Wednesday
October 25, 2017

4:00 PM
Math Tower 5-127
Analysis Student Seminar
TBA, Stony Brook University
TBA


Thursday
October 26, 2017

4:00 PM - 5:00 PM
Math Tower P-131
Colloquium
TBA,
Cross-listed with SCGP workshop


Friday
October 27, 2017

2:30 PM - 3:30 PM
Math Tower P-131
Dynamical Systems Seminar
Babak Modami, Stony Brook University
Renormalization in Teichmuller dynamics

After a brief review of Masur's criterion which is an example of the renormalization technique in Teichmuller dynamics, we show that an analogue of the criterion does not hold for the Weil-Petersson geodesic flow. The talk is based on a joint work with Jeff Brock from 2015.


Monday
October 30, 2017

1:00 PM
5-127
RTG Seminar
Yoonjoo Kim, Stony Brook University
Degenerations of Hodge Structures

TBA


Monday
October 30, 2017

4:00 PM - 5:30 PM
Math Tower P-131
Special Algebra / Algebraic Geometry Seminar
Remy van Dobben de Bruyn, Columbia University
Dominating varieties by liftable ones.

Given a smooth projective variety over an algebraically closed field of positive characteristic, can we always dominate it by another smooth projective variety that lifts to characteristic 0? We give a negative answer to this question.


Tuesday
October 31, 2017

4:00 PM - 5:30 PM
Math Tower P-131
Geometry/Topology Seminar
Vincent Moncrief, Yale University
TBA


Wednesday
November 01, 2017

1:00 PM - 2:00 PM
Math Tower P-131
Graduate Student Seminar
Chase Middleman, Stony Brook University
TBA

TBA


Wednesday
November 01, 2017

4:00 PM - 5:30 PM
Math Tower P-131
Algebraic geometry seminar
Inna Zakharevich, Cornell
TBA


Thursday
November 02, 2017

4:00 PM - 5:00 PM
Math Tower P-131
Colloquium
Simon Marshall, University of Wisconsin
TBA

TBA


Friday
November 03, 2017

2:30 PM - 3:30 PM
Math Tower P-131
Dynamical Systems Seminar
Pierre Berger, Université Paris 13
TBA

TBA


Tuesday
November 07, 2017

4:00 PM - 5:30 PM
Math Tower P-131
Geometry/Topology Seminar
Mehdi Lejmi, CUNY
TBA


Wednesday
November 08, 2017

4:00 PM - 5:30 PM
Math Tower P-131
Algebraic geometry seminar
Fedor Bogomolov, NYU
TBA

TBA


Wednesday
November 08, 2017

2:30 PM - 3:30 PM
Math Tower P-131
Mini Course / Dynamics Learning Seminar
Leon Takhtajan, Stony Brook University
TBA

TBA


Friday
November 10, 2017

2:30 PM - 3:30 PM
Math Tower P-131
Dynamical Systems Seminar
Michael Yampolsky, University of Toronto
TBA

TBA


Tuesday
November 14, 2017

4:00 PM - 5:30 PM
Math Tower P-131
Geometry/Topology Seminar
Eveline Legendre, Universite de Toulouse
TBA

TBA


Wednesday
November 15, 2017

2:30 PM - 3:30 PM
Math Tower P-131
Mini Course / Dynamics Learning Seminar
Leon Takhtajan, Stony Brook University
TBA

TBA


Wednesday
November 15, 2017

4:00 PM - 5:30 PM
Math Tower P-131
Algebraic geometry seminar
Nicolas Addington, U. Oregon
TBA

TBA


Wednesday
November 15, 2017

1:00 PM - 2:00 PM
Math Tower P-131
Graduate Student Seminar
Tobias Shin, Stony Brook University
TBA

TBA


Friday
November 17, 2017

2:30 PM - 3:30 PM
Math Tower P-131
Dynamical Systems Seminar
Enrique Pujals, IMPA
TBA

TBA


Wednesday
November 22, 2017

4:00 PM - 5:30 PM
Math Tower P-131
Algebraic geometry seminar
Happy TKSgiving!, Happy TKSgiving!
Happy TKSgiving!

Happy TKSgiving!


Tuesday
November 28, 2017

4:00 PM - 5:00 PM
Math Tower P-131
Geometry/Topology Seminar
Antonio Ache, University of Notre Dame
TBA


Wednesday
November 29, 2017

1:00 PM - 2:00 PM
Math Tower P-131
Graduate Student Seminar
Jae Ho Cho, Stony Brook University
TBA

TBA


Wednesday
November 29, 2017

4:00 PM - 5:30 PM
Math Tower P-131
Algebraic geometry seminar
Christian Schnell, Stony Brook University
TBA

TBA


Friday
December 01, 2017

2:30 PM - 3:30 PM
Math Tower P-131
Dynamical Systems Seminar
Sabyasachi Mukherjee, Stony Brook University
TBA

TBA


Wednesday
December 06, 2017

2:30 PM - 3:30 PM
Math Tower P-131
Colloquium
Dorian Goldfeld, Columbia University
TBA

TBA


Wednesday
December 06, 2017

4:00 PM - 5:30 PM
Math Tower P-131
Algebraic geometry seminar
Davesh Maulik, MIT
TBA

TBA


Show events for:
Instructions for subscribing to Stony Brook Math Department Calendars