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September 2020

Dalhousie-AARMS AAMP Seminar: Michael Ward (UBC)

September 25, 2020 @ 4:00 pm - 5:00 pm
Zoom seminar

Synchrony and Oscillatory Dynamics for a 2-D PDE-ODE Model of Diffusion-Sensing with Small Signaling Compartments We analyze a class of cell-bulk coupled PDE-ODE models, motivated by quorum and diffusion sensing phenomena in microbial systems, that characterize communication between localized spatially segregated dynamically active signaling compartments or "cells" that have a permeable boundary. In this model, the cells are disks of a common radius and they are spatially coupled through a passive extracellular bulk diffusion field with diffusivity in a bounded…

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October 2020

Dalhousie-AARMS AAMP Seminar: John Toth (McGill University)

October 2, 2020 @ 4:00 pm - 5:00 pm
Zoom seminar

Title: Pointwise bounds for joint eigenfunctions of quantum completely integrable (QCI) systems Abstract: I will discuss some recent results on improvements in supremum bounds for joint eigenfunctions of QCI systems together with sharp exponential decay estimates away from the projections of invariant Lagrangian tori (ie. in the microlocally forbidden region). This is joint work with Jeff Galkowski. The Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 - 5 pm Atlantic Time over Zoom.  If you would like to…

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Dalhousie-AARMS AAMP Seminar: Julie Rowlett (Chalmers, Sweden)

October 16, 2020 @ 4:00 pm - 5:00 pm
Zoom seminar

Decisions and Disease Do you usually get a flu shot every year? Do you usually take preventive measures to avoid contracting sexually transmitted infections? It is reasonable to expect that while many people may answer `no‘ to the first question, they may answer `yes‘ to the second question. In recent joint work with my PhD student, Carl-Joar Karlsson, we have discovered a mathematical explanation for these different choices. Here I will explain mathematical models we have developed that combine the…

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Dalhousie-AARMS AAMP Seminar: Hari Kunduri (Memorial University)

October 23, 2020 @ 4:00 pm - 5:00 pm
Zoom seminar

Title: Geometric inequalities for axisymmetric black holes Abstract: In general relativity, isolated, dynamical black holes arise from asymptotically flat initial data for the Einstein equations. Such data are characterized by invariants such as the ADM mass and angular momentum. When angular momentum is conserved in the evolution, the standard picture of gravitational collapse suggests an inequality relating the ADM mass and angular momentum. Such geometric inequalities have been rigorously proved for axisymmetric, asymptotically flat maximal initial data for the vacuum Einstein…

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