ACTIVITIES AT THE GRADUATE CENTER

A lot of seminars are organized at the Graduate Center. Look at the weekly seminars bulletin that is updated every Tuesday.
Here, you will find the seminars I am involved with, and conferences I have organized at the Graduate Center.

Nonlinear Group Study

This meeting aims to investigate nonlinear problems arising in Differential geometry and mathematical physics. It gives graduates students the opportunity to be familiar with a wide range of open problems, and learn tools from the calculus of variations to tackle some of these questions. Our meeting takes place

One goal of this reading group is to introduce some papers that are related to a series of symposium in applied mathematics that are sponsored by the Initiative for the Theoretical Sciences.

SCHEDULE Spring 2013:

• February 7, 2013
  No Seminar
  
  
• February 14, 2013
  Yuan Lou, The Ohio State University
  Asymptotic behavior of the principal eigenvalue for cooperative elliptic operators and applications
  Abstract: I will discuss the asymptotic behavior of the principal eigenvalue for general linear cooperative elliptic systems with sufficiently small diffusion rates. As an application, we show that if a cooperative system of ordinary differential equations has a unique positive steady state which is globally asymptotically stable, then the corresponding reaction-diffusion system with either the Neumann boundary condition alsohas a unique positive steady state which is globally asymptotically stable, provided that the diffusion coefficients are small. This is a joint work with King-Yeung Lam, Mathematical Biosciences Institute.
  
  
• February 21, 2013
  Mikhail Shklyar, Graduate Center (CUNY)
  Minimizers for a Moser-Trudinger type functional
  Abstract: We summarize some known results that ensure existence of minimizers for a functional that is related to the two-dimensional Moser-Trudinger inequality
  
  
• February 28, 2013
  One day symposium in Room 4102 from 9:30am-4:00pm
  Perspectives on Ricci Flow
  Speakers: David Glickenstein, Dan Knopf, Jian Song, Ioana Suvaina
  An event sponsored by the Initiative for the Theoretical Sciences at CUNY (ITS)
  
  
• March 7, 2013
  Costante Bellettini, Princeton University and Institute for Advanced Study
  Regularity issues for Calibrated Currents
  Abstract: Calibrated currents provide interesting explicit examples of solutions to Plateau's problem. Their role goes however much beyond that: they naturally appear when dealing with several geometric questions, some aspects of which require a deep understanding of regularity properties of calibrated currents. After this introduction I will present an "infinitesimal regularity" result, namely on the uniqueness of tangent cones for pseudo holomorphic currents.
  
  
• March 14, 2013
  One day symposium in Room 4102 from 9:30am-4:00pm
  Pi-Day with Chern-Simons Theory
  Speakers: Zheng-Chao Han (Rutgers University), Jyotsna Prajapat (PI-Institue, Abu Dhabi), Daniel Spirn (University of Minnesota), Gabriella Tarantello (Rome University II)
  Schedule, abstract and Poster
  An event sponsored by the Initiative for the Theoretical Sciences at CUNY (ITS)
  
  
• Friday March 15, 2013
  Research group discussion with Prof. Fridemann Schuricht (Dresden University) and Prof Shivaji Ratnasingham (University of North Carolina) on analytic technics in nonlinear analysis and nonsmooth analysis.
  Meeting takes place in the Room 4412 (ITS Room)
  
  
• March 21-March28, 2013
  No Seminar (Spring Break)
  
  
• April 4, 2013
  Marco Squassina, University of Verona
  Symmetry in variational principles and applications
  Abstract: We formulate symmetric versions of classical variational principles in the framework of smooth and nonsmooth critical point theory. Then, we discuss their applications to nonlinear partial differential equations.
  
  
• April 11, 2013
  Changfeng Gui, University of Connecticut
  Traveling wave solutions to reaction diffusion equations with fractional Laplacians
  Abstract: In this talk, I will discuss the existence and asymptotic behavior of traveling wave solutions to Allen-Cahn equation with fractional Laplacians where the double well potential has unequal depths. A key ingredient is the estimate of the speed of the traveling wave in terms of the potential, which seems new even for the classical Allen-Cahn equation. I will also discuss nonexistence of traveling wave solutions to a nonlocal combustion model. The talk is based on recent results obtained jointly with Tingting Huan and with Mingfeng Zhao respectively.
  
  
• April 18, 2013
  No Seminar
  
  
• April 25, 2013
  One day symposium in Room 4102 from 9:30am-4:00pm
  Topics in Numerical Analysis
  Speakers: Yves Bourgault (University of Ottawa, Canada), David Dritschel (St Andrews University, UK), Tim Kelley (North Carolina), Jie Shen (Purdue University)
  Schedule, abstract and Poster
  An event sponsored by the Initiative for the Theoretical Sciences at CUNY (ITS)
  
  

PAST ACTIVITIES

Differential Geometry Seminar

Every Tuesday from 3:00--4:00pm, I am involved in the Differential geometry seminar with Zheng Huang and Dan Lee. To see the abstracts and list of speakers planned at this seminar, click here.

• 04/08/2011: Ratnasingham Shivaji, Mississipi State University, Positive Solutions for Nonlinear Elliptic Systems with Combined Nonlinear Effects [abstract].
• 03/11/2011: Friedemann Schuricht, Dresden University of Technology, Eigenvalue problem of the 1-Laplace operator [abstract].
• 04/16/2010: Peter Gordon, New Jersey Institute of Technology, Thermal explosion in porous media as a blow up problem.
• 04/12/2010: Zhong-Wei Tang, Beijing Normal University, Multibump solutions of nonlinear Schrödinger equations with indefinite potential.
• 04/05/2010: Florin Catrina, St. John University, An energy balance identity and radial solutions for elliptical PDE's.
• 02/19/2010: Sasha Stoikov, Cornell University, A stochastic model for order book dynamics.
• 12/18/2009: Vitaly Moroz, Swansea University, Existence and concentration for nonlinear Schrödinger equations with fast decaying.
• 12/04/2009: Maria Psarelli, Bronx CC - CUNY, Time decay properties of nonlinear Maxwell-Dirac equations in 4-dimensional Minkowski spacetime.
• 11/13/2009: Carlo Lancellotti, College of Staten Island - CUNY, The Master Equation Approach in Kinetic Theory.
• 03/14/2008: Enea Parini, University of Cologne, Some results about Cheeger sets: uniqueness and non-uniqueness.
• 03/14/2008: Bernd Kawohl, University of Cologne, Variational versus PDE-based Approaches in Mathematical Image Processing.
• 02/15/2008: Cyrill Muratov, New Jersey Institute of Technology, Self-induced stochastic resonance: How new non-random behaviors can arise from the action of noise.

• February 23, 2012: Recent Developments in minimal surfaces (with Z. Huang).
• October 2011: Symposium on Recent advances in 3D Euler and Navier-Stokes equations (with J. Vukadinovic).
• September 2011: Symposium on Recent trends in nonlinear PDEs (with Z. Huang).
• March 2011: Symposium on Vortex Dynamics and non-equilibrium statistical mechanics (with Andrew Poje) flyer, schedule.
• May 2010: Field Theory workshop. Speakers: Justin Vazquez-Poritz, Maria Psarelli, Peter Orland (with Tobias Schäfer).
• March 2010: CUNY Geometric Analysis 2010, Bubbling Phenomena and Non-Compactness (with B. Santoro, J. Dodziuk).
• June 2008: CUNY Isoperimetric Inequality Workshop (with C. Sormani).