Organizers: Glatt-Holtz, Nathan and Zhao, Kun

September 15

**Abstract**:

October 20

**Dr. Changhui Tan**Rice University

**Abstract**:

Self-organized behaviors are commonly observed in nature and human societies, such as bird flocks, fish swarms and human crowds. In this talk, I will present some celebrated mathematical models, with simple small-scale interactions which lead to the emergence of global behaviors: aggregation and flocking. I will discuss the models in different scales: from microscopic agent-based dynamics, through kinetic mean-field descriptions, to macroscopic fluid systems. In particular, the macroscopic models can be viewed as compressible Euler equations with nonlocal interactions. I will show some recent results on the global wellposedness theory of the systems, large time behaviors, and interesting connections to some classical equations in fluid mechanics.

October 27

**Swati Patel**Tulane University

**Abstract**:

A fundamental question in ecology and evolutionary biology is to understand the mechanisms that lead to the diversity that we observe in natural communities. In recent years, there has been empirical evidence that feedbacks between species densities and trait evolution, termed eco-evolutionary feedbacks, may play a role in maintaining diversity. In this talk, I will first discuss a mathematical framework for understanding diversity and the role of eco-evolutionary feedbacks. Then, I discuss results from applying this framework to understand the coexistence of two prey that share one predator.

November 3

**Axel Saen**University of Virginia

**Abstract**:

For ASEP on the line, the system may never reach equilibrium dynamics depending on the initial conditions. Whereas for ASEP on the ring, one expects the system to reach equilibrium dynamics given enough time. In the special case of TASEP on the ring, there are recent result that give the specific crossover from KPZ dynamics and equilibrium dynamics. In collaboration with Z. Liu and D. Wang, we obtain the transition probability formulas for the periodic ASEP model. These formulas specialize to the formulas of ASEP on the line and TASEP on the ring, which are a first step to generalize the results of ASEP on the line and TASEP on the ring.

Date

**Speaker**Institution

**Abstract**: TBA

December 1

**Prof. Chongsheng Cao**Florida International University

**Abstract**:

Boussinesq systems are governing equations to the fluid flow of oceans and atmosphere. The systems are the Navier-Stokes equations and a heat transport equation. The global wellposedness of the 3D Boussinesq equations is still open. In this talk we will discuss some reduced 3D Boussinesq systems and also 2D Boussinesq systems. We will present results about the global regularity to these systems.

Mathematics Department, 424 Gibson Hall, New Orleans, LA 70118 504-865-5727 math@math.tulane.edu