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DTSTART;TZID=America/Halifax:20201002T160000
DTEND;TZID=America/Halifax:20201002T170000
DTSTAMP:20200927T175953Z
CREATED:20200904T115630Z
LAST-MODIFIED:20200927T175953Z
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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
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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: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: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
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