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Ioan Bejenaru
Tue Feb 26, 2013
3:00 pm
I will discuss the problem of global well-posedness for equivariant
Scroedinger Maps with energy below the natural threshold both in the focusing (maps to S^2) and defocusing case (maps to H^2).
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Ken Mease
Tue Feb 26, 2013
1:00 pm
Finite-time Lyapunov exponents and vectors are used to define and diagnose boundary-layer type, two-timescale behavior and to determine the associated manifold structure in the flow. Two-timescale behavior is characterized by a slow-fast splitting of the tangent bundle for a state space region. The slow-fast splitting, defined by finite-time...
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Louidor
Tue Feb 26, 2013
11:00 am
We consider the Williams Bjerknes model, also known as the biased voter model on the d-regular tree T^d, where d \geq 3. Starting from an initial configuration of ``healthy'' and ``infected'' vertices, infected vertices infect their neighbors at Poisson rate \lambda \geq 1, while healthy vertices heal their neighbors at Poisson...
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Alex Mogilner
Mon Feb 25, 2013
4:00 pm
Animal cells crawl on flat surfaces using lamellipodium – dynamic network of actin polymers and myosin motors enveloped by the cell membrane. Experimental analysis of the lamellipodial geometry, cell speed and actin dynamics in fish keratocyte cells combined with computational modeling suggested that steady crawling of the motile cells is...
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Ralf-Dieter Schindler
Mon Feb 25, 2013
4:00 pm
Set theory studies reflection principles of different forms. The talk will discuss the role of stationary reflection and threadability in the core model induction. I will not presuppose any serious knowledge of inner model theory, though.
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Richard Schoen
Mon Feb 25, 2013
3:00 pm
For closed surfaces and for surfaces with boundary there are natural eigenvalue extremal problems whose solutions, when they exist, determine minimal surfaces in the sphere or the ball with a natural boundary condition. We will discuss the existence problem and describe some geometric properties of extremal metrics.
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Sat Feb 23, 2013
2:00 pm
