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BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20230331T160000
DTEND;TZID=America/Halifax:20230331T170000
DTSTAMP:20230224T143704Z
CREATED:20200904T115630Z
LAST-MODIFIED:20230224T143704Z
UID:7130-1680278400-1680282000@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Erick Schulz (ETH Zürich)
DESCRIPTION:Title + Abstract: TBD\nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over either Zoom and/or in Chase 227 depending on the speaker.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2-2-2-4-2-2-2-2-2-2-2-2-3/
LOCATION:Dalhousie University\, Halifax\, Nova Scotia\, Canada
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20230317T160000
DTEND;TZID=America/Halifax:20230317T170000
DTSTAMP:20230314T085635Z
CREATED:20200904T115630Z
LAST-MODIFIED:20230314T085635Z
UID:7000-1679068800-1679072400@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Milivoje Lukic (Rice U.)
DESCRIPTION:Title: Universality limits for orthogonal polynomialsAbstract: It is often expected that the local statistical behavior ofeigenvalues of some system depends only on its local properties; forinstance\, the local distribution of zeros of orthogonal polynomials shoulddepend only on the local properties of the measure of orthogonality. Thisphenomenon is studied using an object called the Christoffel-Darbouxkernel. The most commonly studied case is known as bulk universality\,where the rescaled limit of Christoffel-Darboux kernels converges to thesine kernel.In this talk\, we will survey this subject\, prior results\, and a recentresult which gives for the first time a completely local sufficientcondition for bulk universality. The new approach is based on a matrixversion of the Christoffel-Darboux kernel and the de Branges theory ofcanonical systems\, and it applies to other self-adjoint systems with 2×2transfer matrices such as continuum Schrodinger and Dirac operators.The talk is based on joint work with Benjamin Eichinger (TechnicalUniversity Wien) and Brian Simanek (Baylor University).\nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over either Zoom and/or in Chase 227 depending on the speaker.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2-2-2-4-2-2-2-2-2-2-2-2/
LOCATION:Dalhousie University\, Halifax\, Nova Scotia\, Canada
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20230310T160000
DTEND;TZID=America/Halifax:20230310T170000
DTSTAMP:20221209T171625Z
CREATED:20200904T115630Z
LAST-MODIFIED:20221209T171625Z
UID:6998-1678464000-1678467600@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Katrina Morgan (Northwestern University)
DESCRIPTION:Title + Abstract: TBD\nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over either Zoom and/or in Chase 227 depending on the speaker.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2-2-2-4-2-2-2-2-2-2-2/
LOCATION:Dalhousie University\, Halifax\, Nova Scotia\, Canada
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20230210T160000
DTEND;TZID=America/Halifax:20230210T170000
DTSTAMP:20221209T171515Z
CREATED:20200904T115630Z
LAST-MODIFIED:20221209T171515Z
UID:6996-1676044800-1676048400@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Victor Ivrii (U. Toronto)
DESCRIPTION:Title + Abstract: TBD\nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over either Zoom and/or in Chase 227 depending on the speaker.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2-2-2-4-2-2-2-2-2-2/
LOCATION:Dalhousie University\, Halifax\, Nova Scotia\, Canada
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20230127T160000
DTEND;TZID=America/Halifax:20230127T170000
DTSTAMP:20230110T173057Z
CREATED:20200904T115630Z
LAST-MODIFIED:20230110T173057Z
UID:7006-1674835200-1674838800@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Alex Barnett (Flatiron Institute\, NYC)
DESCRIPTION:Title: Equispaced Fourier representations for efficient Gaussian process regression from a billion data pointsAbstract: Gaussian process regression is widely used in geostatistics\, time-series analysis\, and machine learning. It infers an unknown continuous function in a principled fashion from noisy measurements at $N$ scattered data points.  The prior on the function is Gaussian\, with covariance given by some user-chosen translationally invariantkernel.  Yet $N$ has been limited to about $10^6$\, even with modern low-rank methods.  Focusing on low spatial dimension (1–3)\, we present a GP regression method using kernel approximation by an equispaced quadrature grid in the Fourier domain.  This enables the iterative solution of a smaller Toeplitz linear system\, exploiting both the FFT and the nonuniform FFT to give ${\mathcal O}(N)$ cost. The result is often one to two orders of magnitude faster than state of the art methods\, and enables cheap massive-scale regressions. For example\, for a 2D Mat\’ern-3/2 kernel and $N = 10^9$ points\, the posterior mean function is found to 3-digit accuracy in two minutes on a desktop.Joint work with Philip Greengard (Columbia) and Manas Rachh (Flatiron Institute)\nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over either Zoom and/or in Chase 227 depending on the speaker.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2-2-2-4-2-2-2-2-2-2-2-2-2/
LOCATION:Dalhousie University\, Halifax\, Nova Scotia\, Canada
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20230120T160000
DTEND;TZID=America/Halifax:20230120T170000
DTSTAMP:20230110T172249Z
CREATED:20200904T115630Z
LAST-MODIFIED:20230110T172249Z
UID:6994-1674230400-1674234000@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Chamsol Park (Johns Hopkins University)
DESCRIPTION:Title: Eigenfunction restriction estimates on curves with nonvanishing geodesic curvatures\n\nAbstract: Studying eigenfunctions of the Laplace-Beltrami operator on compact Riemannian manifolds (without boundary) is one of the interesting topics in Harmonic Analysis. One way to study them is to consider the L^p estimates of the eigenfunctions restricted to submanifolds. In this talk\, we briefly summarize previous results and would like to talk about the logarithmic improved analogue for the restriction to curves with nonvanishing geodesic curvatures\, in the presence of nonpositive sectional curvatures in the manifolds. If time permits\, we will discuss some applications and open problems for the Schrodinger counterparts.\n\n\nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom and in Chase 227.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2-2-2-4-2-2-2-2-2/
LOCATION:Dalhousie University\, Halifax\, Nova Scotia\, Canada
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20230113T160000
DTEND;TZID=America/Halifax:20230113T170000
DTSTAMP:20230110T200300Z
CREATED:20200904T115630Z
LAST-MODIFIED:20230110T200300Z
UID:6991-1673625600-1673629200@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Andrea Bertozzi (UCLA)
DESCRIPTION:Title:  Energy Minimizing Surface Tension Configurations for Microparticles\nAbstract: An important area of microfluidics is the creation and manipulation of small droplets. This is commonly done using microchannels or electrowetting. Recently a new method is proposed to create templated droplets using amphiphilic microparticles. These particles are observed to hold nearly equal volumes of aqueous liquid when dispersed in an oil–water mixture. However a theory for this behavior is lacking. In this paper\, we present a mathematical model based on minimizing the surface tension energy of a system of particles. By analyzing this model\, we demonstrate that certain key properties of the particle guarantee the formation of small droplets within a volume range unique to the particle. We also look at statistical dynamics of pairwise exchange of fluids between particles for which the system can reach equilibrium.  We show examples of how such particles are useful for applications such asbiological assays and measurement of chemical secretions from single cells.\n\nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom and in Chase 227.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2-2-2-4-2-2-2-2/
LOCATION:Dalhousie University\, Halifax\, Nova Scotia\, Canada
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20220325T160000
DTEND;TZID=America/Halifax:20220325T170000
DTSTAMP:20220211T135543Z
CREATED:20200904T115630Z
LAST-MODIFIED:20220211T135543Z
UID:6586-1648224000-1648227600@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Manuela Girotti (Saint Mary's Uni.)
DESCRIPTION:Title: Asymptotic Analysis of the Interaction Between a Soliton and a Regular Gas of Solitons (a.k.a. Gulliver and the Lilliputians) \nAbstract: N. Zabusky coined the word “soliton” in 1965 to describe a curious feature he and M. Kruskal observed in their numerical simulations of the initial-value problem for a simple nonlinear PDE. The first part of the talk will be a broad introduction to the theory of solitons/solitary waves and integrable PDEs (the KdV and modified KdV equation in particular)\, describing classical results in the field. \n\nThe second part will focus on some new developments and growing interest into a special case of solitons defined as “solitonic gas” or “integrable turbulence”. In particular\, we will discuss a recent work on long-time asymptotic behaviour of such type of solitons. We will achieve our results by first framing the problem in the setting of a Riemann–Hilbert problem and then by rigorously analyzing it using the powerful technique of nonlinear steepest descent.\n\nThis is a joint work with Tamara Grava (U. Bristol/SISSA)\, Bob Jenkins (UCF)\, Ken McLaughlin (CSU) and Alexander Minakov (U. Karlova).\nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2-2-2-4-2-2-2/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20220311T160000
DTEND;TZID=America/Halifax:20220311T170000
DTSTAMP:20220308T140357Z
CREATED:20200904T115630Z
LAST-MODIFIED:20220308T140357Z
UID:6561-1647014400-1647018000@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Justin Tzou (Macquarie U.)
DESCRIPTION:Title: Modeling and analysis of localized vegetation patterns on curved topography\n\nAbstract: We propose a two-component reaction-advection-diffusion model for vegetation density and soil water concentration on a curved terrain which accounts for downhill flow of soil water\, spatially dependent effective evaporation of soil water\, and vertical rainfall on a curved surface. In the limit of slow diffusion of vegetation\, we construct a one-spot localized solution corresponding to one patch of a periodic spotted vegetation pattern. We derive an ODE for the motion of the spot and determine how it is impacted by different aspects of the terrain. One such aspect is captured by the regular part of a certain Green’s function on the curved surface; I will briefly discuss how we numerically compute this quantity. Joint work with Leo Tzou.\nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2-2-2-4-2-2/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20220218T160000
DTEND;TZID=America/Halifax:20220218T170000
DTSTAMP:20220211T135448Z
CREATED:20200904T115630Z
LAST-MODIFIED:20220211T135448Z
UID:6558-1645200000-1645203600@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Micah Milinovich (U. Mississippi)
DESCRIPTION:Title: Fourier optimization\, prime gaps\, and zeta zeros\n\nAbstract: There are many situations where one imposes certain conditions on a function and its Fourier transform and then wants to optimize a certain quantity. I will describe two ways these types of Fourier optimization problems can arise in the context of the explicit formula\, which relates the primes to the zeros of the Riemann zeta-function. Using information from the zeros to study the primes\, I will show how one can prove the strongest known estimates in the classical problem of bounding the maximum gap between consecutive primes assuming the Riemann hypothesis. Using the explicit formula in the other direction\, one can also use Fourier optimization to prove the strongest known conditional estimates for the number of zeta zeros in an interval on the critical line. This is based on joint works with E. Carneiro\, V. Chandee\, and K. Soundararajan.\nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2-2-2-4-2/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20220211T160000
DTEND;TZID=America/Halifax:20220211T170000
DTSTAMP:20220122T143038Z
CREATED:20200904T115630Z
LAST-MODIFIED:20220122T143038Z
UID:6556-1644595200-1644598800@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Cyril Letrouit (École Normale Supérieure)
DESCRIPTION:Title – Propagation of singularities in subelliptic PDEs \nAbstract – In this talk\, we consider the wave equation where the Laplacian is replaced by a sub-Laplacian (also called “Hörmander sum of square”)\, which is an hypoelliptic operator. We handle the problem of describing the propagation of singularities in such equations : the main new phenomenon that we describe is that singularities can propagate along abnormal curves at any speed between 0 and 1. This general result extends an idea due to R. Melrose\, and we then illustrate it on anexample\, the Martinet case\, following a joint work with Y. Colin de Verdière.  Our statements are part of a classical/quantum correspondance between sub-Riemannian geometry (on the classical side) and the hypoelliptic operator (on the quantum side)\, which is also helpful to interpret results in control theory and spectral theory of hypoelliptic operators. \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2-2-2-4/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20211203T160000
DTEND;TZID=America/Halifax:20211203T170000
DTSTAMP:20211124T221439Z
CREATED:20200904T115630Z
LAST-MODIFIED:20211124T221439Z
UID:6271-1638547200-1638550800@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Jesse Gell-Redman (University of Melbourne)
DESCRIPTION:Title: A Fredholm approach to scattering \nAbstract: We will give a friendly introduction to the scattering theory\, specifically to the matrix for Schrodinger operators.  We will then discuss how a new functional analytic approach to analysis of non-elliptic equations\, due to Vasy\, gives a conceptually attractive method for proving detailed regularity results for nonlinear scattering.  This is joint work with several groups of authors including Andrew Hassell\, Sean Gomes\, Jacob Shapiro\, and Junyong Zhang. \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2-2-2/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20211119T160000
DTEND;TZID=America/Halifax:20211119T170000
DTSTAMP:20211111T152305Z
CREATED:20200904T115630Z
LAST-MODIFIED:20211111T152305Z
UID:6297-1637337600-1637341200@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Amanda Young (Technical University of Munich)
DESCRIPTION:Title: A bulk gap in the presence of edge states for a HaldanepseudopotentialAbstract: In this talk\, we discuss a recent result on a bulk gap for atruncated Haldane pseudopotential with maximal half filling\, whichdescribes a strongly correlated system of spinless bosons in a cylindergeometry. For this Hamiltonian with either open or periodic boundaryconditions\, we prove a spectral gap above the highly degenerateground-state space which is uniform in the volume and particle number.Our proofs rely on identifying invariant subspaces to which we applygap-estimate methods previously developed only for quantum spinHamiltonians. In the case of open boundary conditions\, the lower boundon the spectral gap accurately reflects the presence of edge states\,which do not persist into the bulk. Customizing the gap technique to theinvariant subspace\, we avoid the edge states and establish a moreprecise estimate on the bulk gap in the case of periodic boundaryconditions. The same approach can also be applied to prove a bulk gapfor the analogously truncated 1/3-filled Haldane pseudopotential for thefractional quantum Hall effect. Based off joint work with S. Warzel. \n\nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2-2-2-3/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20211105T160000
DTEND;TZID=America/Halifax:20211105T170000
DTSTAMP:20211103T174033Z
CREATED:20200904T115630Z
LAST-MODIFIED:20211103T174033Z
UID:6273-1636128000-1636131600@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Nina Holden (ETH Zürich and the Courant Institute)
DESCRIPTION:Conformal invariance of percolation on random planar maps\nConformal invariance of critical percolation on the triangular lattice was proved by Smirnov. His proof is hard to extend to critical percolation on other lattices since his proof relies on a combinatorial identity which is only true on the triangular lattice. On random lattices known as random planar maps\, however\, it turns out that conformal invariance can be established. This was done in joint work with Sun\, building on our earlier works with Albenque\, Bernardi\, Garban\, Gwynne\, Lawler\, Li\, and Sepulveda. \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2-2-2-2/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20211029T160000
DTEND;TZID=America/Halifax:20211029T170000
DTSTAMP:20211020T205857Z
CREATED:20200904T115630Z
LAST-MODIFIED:20211020T205857Z
UID:6269-1635523200-1635526800@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Perry Kleinhenz (Michigan State University)
DESCRIPTION:Title: Stabilization rates for the damped wave equation with polynomial and oscillatory damping \n\nAbstract: In this talk I will discuss energy decay of solutions of the Damped wave equation. After giving an overview of classical results I’ll focus on the torus with damping that does not satisfy the geometric control condition. In this setup properties of the damping at the boundary of its support determine the decay rate\, however a general sharp rate is not known. \n\n\nI will discuss damping which is $0$ on a strip and vanishes either like a polynomial $x^b$ or an oscillating exponential $e^{-1/x} sin^2(1/x)$. Polynomial damping produces decay of the semigroup at exactly $t^{-(b+2)/(b+3)}$\, while oscillating damping produces decay at least as fast as $t^{-4/5+\delta}$ for any $\delta>0$. I will explain how these model cases are proved and how they direct further study of the general sharp rate. \n\n  \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2-2/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20211015T160000
DTEND;TZID=America/Halifax:20211015T170000
DTSTAMP:20211014T155748Z
CREATED:20200904T115630Z
LAST-MODIFIED:20211014T155748Z
UID:6267-1634313600-1634317200@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Ben Landon (University of Toronto)
DESCRIPTION:Title: Local eigenvalue statistics of random matrices and Dyson Brownian motion \nAbstract:  Dyson Brownian motion is a stochastic process describing eigenvalue dynamics under a matrix-valued Brownian motion.  We will review this process and its role in the study of universality of the local\nspectral statistics of random matrices.  We discuss results on the local ergodicity of Dyson Brownian motion and applications\, including local eigenvalue universality of the adjacency matrices of sparse random graphs\nand an additive model related to free probability.  Time permitting\, we also review results on the universality of extremal spectral statistics and the fluctuations of a single eigenvalue in the spectral bulk. \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time in Chase 319 on the Dalhousie University campus with some being broadcasted over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3-2/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20210409T160000
DTEND;TZID=America/Halifax:20210409T170000
DTSTAMP:20210113T131108Z
CREATED:20200904T115630Z
LAST-MODIFIED:20210113T131108Z
UID:5721-1617984000-1617987600@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Chunyi Gai (Dalhousie University)
DESCRIPTION: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 attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-3/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20210326T160000
DTEND;TZID=America/Halifax:20210326T170000
DTSTAMP:20210113T130929Z
CREATED:20200904T115630Z
LAST-MODIFIED:20210113T130929Z
UID:5714-1616774400-1616778000@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Jared Wunsch (Northwestern University)
DESCRIPTION: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 attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20210319T160000
DTEND;TZID=America/Halifax:20210319T170000
DTSTAMP:20210113T131005Z
CREATED:20200904T115630Z
LAST-MODIFIED:20210113T131005Z
UID:5719-1616169600-1616173200@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Marco Merkli (MUN)
DESCRIPTION: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 attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2-2-2/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20210312T160000
DTEND;TZID=America/Halifax:20210312T170000
DTSTAMP:20210113T130648Z
CREATED:20200904T115630Z
LAST-MODIFIED:20210113T130648Z
UID:5712-1615564800-1615568400@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: François Monard (U. California\, Santa Cruz)
DESCRIPTION: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 attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london-2/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20210305T160000
DTEND;TZID=America/Halifax:20210305T170000
DTSTAMP:20210113T130546Z
CREATED:20200904T115630Z
LAST-MODIFIED:20210113T130546Z
UID:5709-1614960000-1614963600@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Steven Lester (King's College London)
DESCRIPTION: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 attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-steven-lester-kings-college-london/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20210129T160000
DTEND;TZID=America/Halifax:20210129T170000
DTSTAMP:20201231T203710Z
CREATED:20200904T115630Z
LAST-MODIFIED:20201231T203710Z
UID:5687-1611936000-1611939600@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Alan Lindsay (Notre Dame)
DESCRIPTION: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 attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-2021-01-29/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20210122T160000
DTEND;TZID=America/Halifax:20210122T170000
DTSTAMP:20201231T211013Z
CREATED:20200904T115630Z
LAST-MODIFIED:20201231T211013Z
UID:5685-1611331200-1611334800@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Allan Greenleaf (Rochester)
DESCRIPTION: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 attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-2021-01-22/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20201204T160000
DTEND;TZID=America/Halifax:20201204T170000
DTSTAMP:20201231T203053Z
CREATED:20200904T115630Z
LAST-MODIFIED:20201231T203053Z
UID:5475-1607097600-1607101200@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Peter Hintz (MIT)
DESCRIPTION:Title: Linear stability of slowly rotating Kerr spacetimes\nAbstract: I will describe joint work with Dietrich Häfner and András Vasy in which we study the asymptotic behavior of linearized gravitational perturbations of Schwarzschild or slowly rotating Kerr black hole spacetimes. We show that solutions of the linearized Einstein equation decay at an inverse polynomial rate to a stationary solution (given by an infinitesimal variation of the mass and angular momentum of the black hole)\, plus a pure gauge term. The proof uses a detailed description of the resolvent of an associated wave equation on symmetric 2-tensors near zero energy. \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-2020-10-16-2-2-2-3/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20201127T160000
DTEND;TZID=America/Halifax:20201127T170000
DTSTAMP:20201123T152316Z
CREATED:20200904T115630Z
LAST-MODIFIED:20201123T152316Z
UID:5472-1606492800-1606496400@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Graham Cox (Memorial University)
DESCRIPTION:Title: Nodal deficiency via equipartition energy functionals and the Dirichlet-to-Neumann map\nAbstract: A classic result in differential equations is that the nth eigenfunction\nof a Sturm-Liouville boundary value problem has precisely n-1 zeros.\nCourant’s nodal domain theorem provides a natural generalization of this\nresult to higher dimensions\, but it is generally not sharp. The lack of\nsharpness is measured by the “nodal deficiency” of an eigenfunction.\nDespite over a century of intensive study\, this quantity is still not\nvery well understood. \nThe first explicit formula for the nodal deficiency was obtained in 2012\nby Berkolaiko\, Kuchment and Smilansky\, using an energy functional\ndefined on the space of equipartitions. More recently\, with Jones and\nMarzuola\, I obtained another formula for the nodal deficiency\, in terms\nof Dirichlet-to-Neumann operators defined on the eigenfunction’s nodal\ndomains. While originally derived using symplectic methods\, this result\ncan also be understood using the spectral flow generated by a family of\nboundary conditions imposed on the nodal set. In this talk I will\ndescribe this flow\, and explain how it provides a concrete mechanism by\nwhich low energy eigenfunctions do or do not contribute to the nodal\ndeficiency. I will also describe recent progress relating these two\nformulas for the nodal deficiency\, and hint at some applications to the\ntheory of spectral minimal partitions. \nThis talk represents joint work with Thomas Beck\, Gregory Berkolaiko\,\nIsabel Bors\, Yaiza Canzani\, Grace Conte\, Christopher Jones and Jeremy\nMarzuola. \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-2020-10-16-2-2-2/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20201106T160000
DTEND;TZID=America/Halifax:20201106T170000
DTSTAMP:20201108T225930Z
CREATED:20200904T115630Z
LAST-MODIFIED:20201108T225930Z
UID:5470-1604678400-1604682000@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Reem Yassawi (Open University\, London)
DESCRIPTION:Title: Some tame or wild Cantor dynamical systems\n Abstract: A topological dynamical system is a pair  where  is a compact metric spaces and  is a group or semigroup acting continuously on . One algebraic invariant of a such a dynamical system is the Ellis semigroup.  The Ellis semigroup  of a topological dynamical system is defined to be the compactification of the action  in the topology of pointwise convergence on the space of all function .  Tameness is a concept whose roots date back to Rosenthal’s  embedding theorem\, which says that if a sequence in  does not have a weakly Cauchy subsequence\, then it must be a sequence on unit vectors in .  Köhler linked the concept of tameness to the Ellis semigroup.  A system is tame if its Ellis semigroup has size at most the continuum.  Non-tame systems are very far from tame\, as they must contain a copy of \, the Stone-Cech compactification of . \nIn this talk\, I will briefly survey the properties of the Ellis semigroup that make it an interesting object to study\, and discuss recent developments concerning tameness.  I will then discuss Toeplitz shifts\, which themselves have been studied extensively in this context and is the subject of some joint work with G. Fuhrmann and J. Kellendonk. \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-2020-10-16-2-2-2-2/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20201030T160000
DTEND;TZID=America/Halifax:20201030T170000
DTSTAMP:20201116T135614Z
CREATED:20200904T115630Z
LAST-MODIFIED:20201116T135614Z
UID:5468-1604073600-1604077200@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Jean-Pierre Garbardo (McMaster University)
DESCRIPTION:Title: Factorization of positive definite functions through convolution and the Turàn problem\n Abstract: If  is a finite abelian group\, we call a subset  symmetric if  and  whenever . We also let . We consider the problem of expressing an arbitrary positive definite function  on  as the convolution product of two positive definite functions\, one supported on  and the other one supported on . We show that\, in the particular case where  is the constant function \, this problem is related to the Tur\’an problem for positive definite functions. In the particular case of a finite abelian group\, this last problem asks the following question. Given a symmetric set \, find the maximum value of the sum  if  and  is a positive definite function on  supported on . We introduce the notion of  {\it dual Tur\’an problem for }\, which is essentially the Tur\’an problem for the set \, and show how the Tur\’an problem for  and its dual are related\, and how the factorization mentioned above plays a role is solving both those problems. We will then give an overview of how these results can be extended to other abelian groups such as . \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-2020-10-16-2-2/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20201023T160000
DTEND;TZID=America/Halifax:20201023T170000
DTSTAMP:20201018T164418Z
CREATED:20200904T115630Z
LAST-MODIFIED:20201018T164418Z
UID:5465-1603468800-1603472400@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Hari Kunduri (Memorial University)
DESCRIPTION:Title: Geometric inequalities for axisymmetric black holes\nAbstract: 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\nstandard 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 equations. I will discuss recent work on extending this class of inequalities to higher dimensions\, where a number of qualitative differences arise (e.g. black holes can have non-spherical horizon topology). In particular\, I will discuss how a lower bound for the mass\, in terms of a (regularized) harmonic energy functional is obtained. \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-2020-10-16-2/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20201016T160000
DTEND;TZID=America/Halifax:20201016T170000
DTSTAMP:20200923T163932Z
CREATED:20200904T115630Z
LAST-MODIFIED:20200923T163932Z
UID:5459-1602864000-1602867600@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: Julie Rowlett (Chalmers\, Sweden)
DESCRIPTION:Decisions and Disease\nDo 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 spread of different types of diseases together with the evolution of human behavioral choices. These models create dynamical systems\, and the stable equilibrium points provide insights into both the spread of disease as well as the evolution of human behaviors. These insights may be relevant for both the current pandemic as well as any new diseases we may encounter in the future. \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-2020-10-16/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Halifax:20201002T160000
DTEND;TZID=America/Halifax:20201002T170000
DTSTAMP:20200927T175953Z
CREATED:20200904T115630Z
LAST-MODIFIED:20200927T175953Z
UID:5461-1601654400-1601658000@aarms.math.ca
SUMMARY:Dalhousie-AARMS AAMP Seminar: John Toth (McGill University)
DESCRIPTION:Title: Pointwise bounds for joint eigenfunctions of quantum completely integrable (QCI) systems \nAbstract: 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. \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details.
URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-2020-10-02/
LOCATION:Zoom seminar
CATEGORIES:AAMP Seminar
ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca
END:VEVENT
END:VCALENDAR