The Mathematics Department holds regular seminars on a variety of topics. Please see below for further details.
Seminars
Seminar | Meeting Details | Title & Abstract |
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Pre-print Algebra Seminar | The generators, relations and type of the Backelin Semigroup Speaker: Arun Suresh |
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Algebra Seminar | The Strange World of Quotients in Algebraic Geometry In algebraic geometry, the existence and geometry of quotient schemes is a delicate issue. Even when quotients exist, they may not reflect enough properties of the original group action to be useful. The machinery of geometric invariant theory is one prescription for identifying open subsets of the original scheme that admit useful quotients, but it can be shown that there are, in general, other open sets that also admit well-behaved quotients. In this talk, we examine particular actions of diagonalizable groups on affine space and illustrate the wide variety of properties that quotients arising from this action can have. Speaker: Dillon Lisk (University of Missouri) |
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Algebra Seminar | The Strange World of Quotients in Algebraic Geometry In algebraic geometry, the existence and geometry of quotient schemes is a delicate issue. Even when quotients exist, they may not reflect enough properties of the original group action to be useful. The machinery of geometric invariant theory is one prescription for identifying open subsets of the original scheme that admit useful quotients, but it can be shown that there are, in general, other open sets that also admit well-behaved quotients. In this talk, we examine particular actions of diagonalizable groups on affine space and illustrate the wide variety of properties that quotients arising from this action can have. Speaker: DIllon Lisk (University of Missouri) |
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Differential Equations Seminar | On the stability of solitary waves in the NLS system of the third-harmonic generation In this talk, we will consider the NLS system of the third-harmonic generation. Our interest is in solitary wave solutions and their stability properties. The recent work of Oliveira and Pastor, discussed global well-posedness, finite time blow-up, as well as other aspects of the dynamics. These authors have also constructed solitary wave solutions, via the method of the Nehari manifold, in an appropriate range of parameters. Specifically, the waves exist only in spatial dimensions \(n=1,2,3\). They have also established some stability/instability results for these waves. In this work, we systematically build and study solitary waves for this important model. We construct the waves in the largest possible parameter space, and we provide a complete classification of their spectral stability. Finally, we showed instability by a blow-up, for dimension 3, and for a more restrictive set of parameters, we use virial identities methods to derive the strong instability, in the spirit of Ohta's approach. This is joint work with Atanas Stefanov. Speaker: Abba Ramadan (University of Alabama) |
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Graduate Student Seminar | Graduate Student Seminars Friday 4-5 PM, MSB 110 |
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Geometry and Topology Seminar | Geometry & Topology Seminars Thursday 2-3 PM, Online (Contact organizer for link) |
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Student Algebraic Geometry Seminar | Student Algebraic Geometry Seminars Wednesday 5-6 PM, MSB 110 |
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Analysis Seminar | Analysis Seminars Tuesday 2-3 PM, MSB 111 |
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Commutative Algebra Regional Expository Seminar (CARES) | CARES Seminars Monday 5-6 PM, Zoom (Contact organizer for link) |