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Research Seminars: Algebra and Combinatorics

Spring 2014

Time & Location: All talks are on Wednesdays in Gibson 126 at 3:00 PM unless otherwise noted.
Organizer: Tai Huy Ha

January 22

Topic

Speaker - Institution

Abstract: TBA


January 29

Topic

Speaker - Institution

Abstract: TBA


February 5

Topic

Speaker - Institution

Abstract: TBA


February 12

Topic

Speaker - Institution

Abstract: TBA


February 19

Topic

Speaker - Institution

Abstract: TBA


February 26

Topic

Speaker - Institution

Abstract: TBA


March 12

Title

Fabrizio Zanello - Michigan Tech University

Abstract:

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March 19

Topic

Speaker - Institution

Abstract: TBA


March 26

The Bourbaki-Chabauty-Vietoris Space of Closed Subgroups of a Locally Compact Group

Karl Hofmann - Tulane University and Technische Universitat Darmstadt

Abstract:

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April 2

Topic

Speaker - Institution

Abstract: TBA


April 4

The Combinatorics of Affine Spherical Varieties

Bart Van Steirteghem - City University of New York

Abstract:

 

Spherical varieties form a remarkable class of algebraic varieties equipped with an action of a complex reductive group G. They include toric, flag and symmetric varieties. A natural invariant of an affine spherical variety X is the set S(X) of irreducible representations of G that occur in the coordinate ring O(X) of X.  Motivated by the question "given S(X), what are the possible multiplication laws on O(X)?" I will discuss the rich combinatorial theory of spherical varieties. This will include recent work with G. Pezzini and work in progress with P. Bravi.

Location:  Gibson 400D

Time:  3:00 PM


April 9

A Construction on Hibi Rings and Standard Monomial Theory for Classical Null Cones

Roger Howe - Yale University

Abstract:

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Location:  Gibson 414

Time:  4:30 PM


April 11

Matroids and Graphs in Surfaces

Iain Moffatt - Royal Holloway, University of London

Abstract:

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Location:  Gibson 400D

Time:  2:00 PM


April 16

Topic

Speaker - Institution

Abstract: TBA


April 23

Anosov Lie Algebras and Algebraic Units in Number Fields

Meera Mainkar - Central Michigan University

Abstract:

In the theory of dynamical systems, Anosov diffeomorphisms are an important class of dynamically  interesting diffeomorphisms of Riemannian manifolds. The study of Anosov diffeomorphisms on nilmanifolds (compact quotients of simply connected nilpotent Lie groups)  leads to interesting algebraic and arithmetic problems related to Lie algebras. In particular, this relates to very special algebraic units in number fields. We study the classification of Anosov Lie algebras by studying the properties of these algebraic units.



Mathematics Department, 424 Gibson Hall, New Orleans, LA 70118 504-865-5727 math@math.tulane.edu