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PRODID:Mathematics Seminar Calendar
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UID:20170924T065426-4111@math.msu.edu
DTSTAMP:20170924T065426Z
SUMMARY:Postdoc Lightning Talks
DESCRIPTION:Speaker\: MSU Postdocs\r\n
LOCATION:C304 Wells Hall
DTSTART:20170907T201000Z
DTEND:20170907T210000Z
URL:https://math.msu.edu/Seminars/TalkView.aspx?talk=4111
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UID:20170924T065426-4113@math.msu.edu
DTSTAMP:20170924T065426Z
SUMMARY:Actuarial Kickoff Lecture
DESCRIPTION:Speaker\: Robert J. Rietz, MAAA\r\n"Effects of Gainsharing Provisions on the Selection of a\r\nDiscount Rate for a Defined Benefit Pension Plan
LOCATION:B117 Wells Hall
DTSTART:20170908T190000Z
DTEND:20170908T203000Z
URL:https://math.msu.edu/Seminars/TalkView.aspx?talk=4113
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UID:20170924T065426-4091@math.msu.edu
DTSTAMP:20170924T065426Z
SUMMARY:Solving polynomials with (higher) positive curvature
DESCRIPTION:Speaker\: Jason Starr, Stony Brook University\r\nA smooth solution set of a system of complex polynomials is a manifold that can be studied geometrically. About 15 years ago, two results proved the existence of solutions of the system over a "function field of a complex curve" (Graber-Harris-Starr) and over a finite field (Esnault) provided the associated complex manifolds have positive curvature in a weak sense (rational connectedness). More recently, when \r\nthe manifold satisfies a higher version of positive curvature (rational simple connectedness), a similar result was proved over a function field of a complex surface (de Jong-He-Starr). I will explain these results, some applications to algebra (Serre's "Conjecture II", "Period-Index"), and recent extensions, joint with Chenyang Xu, to "function fields over finite fields" and Ax's "PAC fields".
LOCATION:C304 Wells Hall
DTSTART:20170914T201000Z
DTEND:20170914T210000Z
URL:https://math.msu.edu/Seminars/TalkView.aspx?talk=4091
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UID:20170924T065426-4106@math.msu.edu
DTSTAMP:20170924T065426Z
SUMMARY:What is many-body localization?
DESCRIPTION:Speaker\: Günter Stolz, University of Alabama Birmingham\r\nThe phenomenon of many-body localization (MBL), as opposed to one-particle or Anderson localization, has recently received strong attention in the physics and quantum information literature. We will discuss the difference between these two concepts and then propose disordered quantum spin systems as a suitable model to study MBL. Among the possible manifestations of MBL we will mention the absence of many-body (or information) transport as well as area laws for the quantum entanglement of eigenstates. Examples where these properties can be proven include the random XY chain and, more recently, the droplet regime of the random XXZ chain. But many problems remain open.
LOCATION:C304 Wells Hall
DTSTART:20170928T201000Z
DTEND:20170928T210000Z
URL:https://math.msu.edu/Seminars/TalkView.aspx?talk=4106
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UID:20170924T065426-4125@math.msu.edu
DTSTAMP:20170924T065426Z
SUMMARY:The Development of Shocks in Compressible Fluids
DESCRIPTION:Speaker\: Demetrios Christodoulou, ETH Zurich\r\nThe lecture shall trace the history of the theoretical study of the formation and evolution of shocks in compressible fluids, starting with the fundamental work of Riemann, the first work on nonlinear hyperbolic partial differential equations. Riemann considered the case of plane symmetry where the problem reduces to 1 spatial dimension. One milestone in the development of the theory was the work of Sideris who gave the first general proof of the finite time breakdown of smooth solutions in 3 spatial dimensions. Another milestone was the work of Majda who first addressed the problem of the local in time continuation of a shock front as a nonlinear free boundary problem for a nonlinear hyperbolic system of partial differential equations. I shall then discuss my own work, which uses differential geometric methods and resolves the resulting singularities giving a complete description in terms of smooth functions.\r\n\r\n\r\nMy first work studies the maximal smooth development of given smooth initial data, the boundary of the domain of this development, and the behavior of the solution at this boundary. The boundary contains certain singular hypersurfaces which originate from certain singular surfaces. The singular surfaces do occur in nature, but not the singular hypersurfaces. My second work studies the physical evolution beyond the singular surfaces by solving a nonlinear free boundary problem with singular initial conditions associated to each of the singular surfaces. From each singular surface a shock hypersurface issues which appears as the corresponding free boundary.
LOCATION:C304 Wells Hall
DTSTART:20171004T201000Z
DTEND:20171004T210000Z
URL:https://math.msu.edu/Seminars/TalkView.aspx?talk=4125
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UID:20170924T065426-4092@math.msu.edu
DTSTAMP:20170924T065426Z
SUMMARY:TBA
DESCRIPTION:Speaker\: Björn Sandstede, Brown University\r\n
LOCATION:C304 Wells Hall
DTSTART:20171005T201000Z
DTEND:20171005T210000Z
URL:https://math.msu.edu/Seminars/TalkView.aspx?talk=4092
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BEGIN:VEVENT
UID:20170924T065426-4093@math.msu.edu
DTSTAMP:20170924T065426Z
SUMMARY:TBA
DESCRIPTION:Speaker\: Frank Sottile, Texas A&M University\r\n
LOCATION:C304 Wells Hall
DTSTART:20171012T201000Z
DTEND:20171012T210000Z
URL:https://math.msu.edu/Seminars/TalkView.aspx?talk=4093
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BEGIN:VEVENT
UID:20170924T065426-4129@math.msu.edu
DTSTAMP:20170924T065426Z
SUMMARY:Complex dynamics and elliptic curves
DESCRIPTION:Speaker\: Laura DeMarco, Northwestern University\r\nIn this talk, I will present some connections between recent research in dynamical systems and the classical theory of elliptic curves and rational points. The main goal is to explain the role of dynamical stability and bifurcations in deducing arithmetic finiteness statements. I will focus on three examples: (1) the theorem of Mordell and Weil from the 1920s, presented from a dynamical point of view; (2) a recent result of Masser and Zannier about torsion points on elliptic curves, and (3) features of the Mandelbrot set.
LOCATION:C304 Wells Hall
DTSTART:20171019T201000Z
DTEND:20171019T210000Z
URL:https://math.msu.edu/Seminars/TalkView.aspx?talk=4129
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BEGIN:VEVENT
UID:20170924T065426-4094@math.msu.edu
DTSTAMP:20170924T065426Z
SUMMARY:TBA
DESCRIPTION:Speaker\: \r\n
LOCATION:C304 Wells Hall
DTSTART:20171026T201000Z
DTEND:20171026T210000Z
URL:https://math.msu.edu/Seminars/TalkView.aspx?talk=4094
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