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Texas A&M University

Events for 11/11/2019 from all calendars

Working Seminar on Quantum Computation and Quantum Information

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Time: 12:30PM - 1:45PM

Location: BLOC 624

Speaker: Li Gao, TAMU

Title: Quantum Brascamp-Lieb Inequalities

Working Seminar in Groups, Dynamics, and Operator Algebras

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Time: 2:00PM - 3:00PM

Location: BLOC 624

Speaker: Alexander Weygandt, Texas A&M University

Title: From weakly nuclear splittings to nuclearity

Geometry Seminar

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Time: 3:00PM - 4:00PM

Location: BLOC 628

Speaker: M. Michalek, MPI Leipzig

Title: Singularities of secant and tangential varieties of Segre-Veronese varieties

Abstract: We will show applications of ideas from statistics to study classical objects in algebraic geometry. A change of coordinates, inspired by computation of cumulants, reveals a toric structure on secant variety of any Segre-Veronese variety. We will show how to exploit this structure to study the singularities.

Frontiers in Mathematics Lecture Series

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Time: 4:00PM - 5:00PM

Location: Blocker 117

Speaker: Mikhail Gromov, Courant Institute and IHES

Title: "What are Live Structures and what kind of Mathematics can account for them?"


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Time: 6:00PM - 7:00PM

Location: BLOC 220

Speaker: Gregory Berkolaiko, Dept of Mathematics, Texas A&M University

Title: Diabolical points and where to find them

Abstract: Wave propagation through periodic medium (such as a crystal or a layered material) is described by dispersion relation, which in most practical computations is a plot of eigenvalues of a matrix which depends on several parameters. Gaps in the dispersion relation correspond to wave frequencies that do not propagate through the material. Diabolical points refer to a special feature in the dispersion relation, a location where two eigenvalues collide. Those are special because a small perturbation of the medium (for example, by a external magnetic field) can create a new gap and thereby turn a conductor into an insulator. We describe the idea behind a numerical algorithm we designed to locate diabolical points for a parametric family of real symmetric matrices. Based on an undergraduate research project of Advait Parulekar.