Calendar
Posted August 22, 2026
Last modified September 15, 2026
Algebra and Number Theory Seminar Questions or comments?
3:00 pm – 4:00 pm Lockett 233 or click here to attend on Zoom
Aniketh Sivakumar, Tulane University
Interpolation Problems and the Asymptotic Growth of Minimum Degrees
Interpolation problems study the hypersurfaces in projective space that pass through a given number of points under certain constraints. Among the main questions are determining the minimum degree of such a hypersurface and understanding the number of independent conditions imposed by the points on hypersurfaces of a fixed degree. In this talk, I will begin with the classical formulation of these interpolation problems and introduce some of the tools used to study them. We will then explore the setting where these points are assigned multiplicities and how this is encoded algebraically. This naturally leads us to the Demailly and Chudnovsky conjectures, which describe how the minimum degree grows asymptotically as the multiplicities grow. Finally, we will discuss recent proofs of these conjectures and their connection to containment problems in commutative algebra.
Event contact: Gene Kopp
Posted August 26, 2026
Last modified September 9, 2026
Informal Analysis Seminar Questions or comments?
12:30 pm – 1:20 pm Lockett 233
Zhiwei Wang, Louisiana State University
Quantitative Volume Estimates for Boundary Singular Sets of Dini--$L^p$ elliptic equations
Let $\Omega \subset \mathbb{R}^n$ be a bounded, connected $C^{1,\mathrm{Dini}}$ domain, and let $u \in W_0^{1,2}(\Omega)$ be a nontrivial solution of \[ \Delta u + V(x)u = 0 \quad \text{in } \Omega, \qquad V \in L^p(\Omega),\ p > n . \] We prove that the singular set $\mathcal{S}_\Omega(u) = \{x \in \Omega : u(x) = 0,\ \nabla u(x) = 0\}$ satisfies the codimension-two volume bound \[ \bigl| \mathcal{T}_r(\mathcal{S}_\Omega(u)) \bigr| \lesssim r^2 \] uniformly up to $\partial\Omega$, with a constant depending only on $n$, $p$, the quantitative $C^{1,\mathrm{Dini}}$ character of $\Omega$, and $\|V\|_{L^p}$ --- but not on $u$. Consequently $\mathcal{S}_\Omega(u)$ has finite $(n-2)$-dimensional Minkowski content and $\dim_{\mathrm{Mink}} \mathcal{S}_\Omega(u) \le n-2$. This extends the harmonic theory of Kenig--Zhao to Schr\"odinger operators with $L^p$ potentials. The new ingredient is an interior singular-set estimate for equations with Dini-continuous leading coefficients, proved via harmonic approximation, cone splitting, and a degree-reducing stopping-time packing argument. Flattening and odd reflection then transfer the estimate to the boundary. This is a joint work with Jiuyi Zhu.
Event contact: Laura Kurtz
Posted August 21, 2026
Geometry and Topology Seminar Seminar website
1:30 pm – 2:30 pm Virtual
Claudia He Yun, UiT The Arctic University of Norway
Computing stable homology representations of graph configuration spaces
Configuration spaces parametrize distinct labelled points in a topological space. They have rich geometry and have been studied extensively. In 2011, Church and Farb introduce the idea of representation stability for a sequence of representations $V_n$ of groups $G_n$. Configuration spaces lend themselves naturally to this framework. In this talk, we will focus on configuration spaces of families of graphs with a fixed number of points and discuss their stability behavior, where $V_n$ is taken to be the rational homology and $G_n$ the automorphism group of the underlying graph. We carry out extensive computational work to determine the stable homology representations for several families with 2 points, such as the star graphs, the complete graphs, and the complete bipartite graphs. We also give combinatorial interpretations to some stable subrepresentations. This is joint work with Eric Ramos. Our paper can be found on the arXiv with handle 2606.13813.
Event contact: Christin Bibby
Posted August 27, 2026
Last modified September 14, 2026
Informal Geometry and Topology Seminar Questions or comments?
3:30 pm Lockett Hall 233
Hailey Garcia, Louisiana State University
Convergence, weak and strong; or, how to recover your modules
We continue our discussion of spectral sequences by considering DGAs with filtrations that are weakly or strongly convergent. Alongside a surprising detour into point-set topology (and a sensible condition on filtrations), we show that spectral sequences of filtered DGAs are unique up to completion.
Posted August 26, 2026
Last modified September 3, 2026
Control and Optimization Seminar Questions or comments?
10:30 am – 11:20 am Zoom: https://lsu.zoom.us/j/98176468969
Pelin Guven Geredeli, Clemson University
Qualitative Properties of Multilayered Structure-Fluid Interaction Coupled PDE Dynamics
We consider a composite structure (multilayered) and fluid interaction PDE system which arises in multi-physics problems, and particularly in biofluidic applications related to the mammalian blood transportation process. The PDE system under consideration consists of the interactive coupling of 3D Stokes flow and 3D elastic dynamics which gives rise to an additional 2D elastic equation on the boundary interface between these 3D PDE systems. We first show the existence-uniqueness properties of the coupled system by means of a nonstandard mixed variational formulation and linear semigroup theory. In the second part, we analyze the long-time behavior of the solutions to such FSI coupled system and address the issue of asymptotic decay of this solution to the zero state via a frequency domain approach.
Posted September 14, 2026
Combinatorics Seminar Questions or comments?
2:30 pm – 3:30 pm Lockett 233
Peter Ramsey, Louisiana State University
The Orlik-Solomon Algebra of a Matroid Prescheme
The Orlik–Solomon algebra is a well-known algebraic invariant of a matroid that, for a matroid arising from a hyperplane arrangement, recovers the cohomology ring of the arrangement complement. Matroid preschemes are locally matroidal combinatorial objects that describe the combinatorics of a more general type of arrangement known as an abelian arrangement. However, the usual definition of the Orlik–Solomon algebra fails to capture all of the relevant data in this setting. We introduce a generalization of the Orlik–Solomon algebra for matroid preschemes and explain how it captures the combinatorial structure of the cohomology ring of abelian arrangements.
Posted August 22, 2026
Last modified September 9, 2026
Algebra and Number Theory Seminar Questions or comments?
3:00 pm – 4:00 pm Lockett 233 or click here to attend on Zoom
Paresh Singh Arora, LSU
Reductions of Certain Well-Poised Hypergeometric Character Sums
Whipple’s classical reduction formulas express well-poised hypergeometric series either as products and quotients of gamma values or as gamma factors multiplied by hypergeometric functions, typically of smaller length. Building on work by Greene, McCarthy, and Li–Long–Tu, we establish finite field analogues of three very well-poised identities corresponding to $_4F_3(-1)$, $_5F_4(1)$, and $_6F_5(-1)$. We show that the associated $\ell$-adic Galois representations constructed by Katz and Beukers–Cohen–Mellit are reducible, explicitly identifying one of their constituents in a way that reflects the corresponding Whipple decompositions. As an application, we obtain new correspondences between well-poised hypergeometric data and modular forms.
Event contact: Gene Kopp
Posted August 26, 2026
Last modified September 2, 2026
Informal Analysis Seminar Questions or comments?
12:30 pm – 1:20 pm Wednesday, September 9, 2026 Lockett 233
Elijah Okemwa
TBD (Control Theory)
Event contact: Laura Kurtz
Posted August 27, 2026
Informal Geometry and Topology Seminar Questions or comments?
3:30 pm Lockett Hall 233
Adithyan Pandikkadan, Louisiana State University
TBD
TBD
Posted August 26, 2026
Informal Analysis Seminar Questions or comments?
12:30 pm – 1:20 pm Lockett 233
Hayden Bromley, Louisiana State University
TBD (Fracture Mechanics)
Event contact: Laura Kurtz
Posted August 27, 2026
Informal Geometry and Topology Seminar Questions or comments?
3:30 pm Lockett Hall 233
Evan Short, Louisiana State University
TBD
TBD
Posted August 27, 2026
Informal Geometry and Topology Seminar Questions or comments?
3:30 pm Lockett Hall 233
Sayani Mukherjee, Louisiana State University
TBD
TBD
Posted August 26, 2026
Informal Analysis Seminar Questions or comments?
12:30 pm – 1:20 pm Lockett 233
Shrinkal Wagle, Louisiana State University
TBD (PDEs)
Posted September 15, 2026
Geometry and Topology Seminar Seminar website
1:30 pm – 2:30 pm Virtual
Ian Cavey, University of Massachusetts Amherst
TBA
Event contact: Kyle Binder
Posted August 27, 2026
Informal Geometry and Topology Seminar Questions or comments?
3:30 pm Lockett Hall 233
Fabian Espinoza de Osambela, Louisiana State University
TBD
TBD
Posted August 26, 2026
Informal Analysis Seminar Questions or comments?
12:30 pm – 1:20 pm Lockett 233
Sayandeep Sarkar, Louisiana State University
TBD (PDEs)
Event contact: Laura Kurtz
Posted September 15, 2026
Geometry and Topology Seminar Seminar website
1:30 pm – 2:30 pm Lockett 233
Emily Stark, Wesleyan University
TBA
Event contact: Kevin Schreve
Posted August 27, 2026
Informal Geometry and Topology Seminar Questions or comments?
3:30 pm Lockett Hall 233
Huong Vo, Louisiana State University
TBD
TBD
Posted August 26, 2026
Informal Analysis Seminar Questions or comments?
12:30 pm – 1:20 pm Lockett 233
Viv Heurtevant, Louisiana State University
TBD (Dynamical Systems)
Event contact: Laura Kurtz
Posted September 15, 2026
Geometry and Topology Seminar Seminar website
1:30 pm – 2:30 pm Lockett 233
Colby Kelln, University of Minnesota
TBA
Event contact: Jagerynn Ting Verano
Posted August 27, 2026
Informal Geometry and Topology Seminar Questions or comments?
3:30 pm Lockett Hall 233
Krishnendu Kar, Louisiana State University
TBD
TBD
Posted August 26, 2026
Informal Analysis Seminar Questions or comments?
12:30 pm – 1:20 pm Lockett 233
Jackson Knox, Louisiana State University
TBD (Dynamical Systems)
Event contact: Laura Kurtz
Posted August 27, 2026
Informal Geometry and Topology Seminar Questions or comments?
3:30 pm Lockett Hall 233
Michael Young, Louisiana State University
TBD
TBD
Posted August 22, 2026
Algebra and Number Theory Seminar Questions or comments?
3:00 pm – 4:00 pm Lockett 233 or click here to attend on Zoom
Isabella Negrini, University of Toronto
TBA
Event contact: Gene Kopp
Posted August 26, 2026
Informal Analysis Seminar Questions or comments?
12:30 pm – 1:20 pm Lockett 233
Ruben Acevedo Acevedo, Louisiana State University
TBD (Spectral Theory)
Posted September 15, 2026
Geometry and Topology Seminar Seminar website
1:30 pm – 2:30 pm Lockett 233
Federico Galetto, Cleveland State University
TBA
Event contact: Christin Bibby
Posted August 27, 2026
Informal Geometry and Topology Seminar Questions or comments?
3:30 pm Lockett Hall 233TBD
TBD (SPEAKER TBD AS WELL)
Posted August 26, 2026
Informal Analysis Seminar Questions or comments?
12:30 pm – 1:20 pm Lockett 233
Moisés Gómez-Solís, Louisiana State University
TBD (Spectral Theory)
Event contact: Laura Kurtz
Posted September 15, 2026
Geometry and Topology Seminar Seminar website
1:30 pm – 2:30 pm Lockett 233
Kushlam Srivastava, University of Wisconsin-Milwaukee
TBA
Event contact: Pallavi Dani
Posted August 27, 2026
Informal Geometry and Topology Seminar Questions or comments?
3:30 pm Lockett Hall 233TBD
TBD (SPEAKER TBD AS WELL)
Posted September 10, 2026
Colloquium Questions or comments?
3:30 pm Lockett 232
Maria Chudnovsky, Princeton University
MacArthur Foundation Fellowship recipient 2012.
TBA
Posted August 26, 2026
Informal Analysis Seminar Questions or comments?
12:30 pm – 1:20 pm Lockett 233
Justin Champagne, Louisiana State University
TBD (Functional Analysis)
Event contact: Laura Kurtz
Posted September 15, 2026
Geometry and Topology Seminar Seminar website
1:30 pm – 2:30 pm Lockett 233
Ping Wan, University of Illinois Chicago
TBA
Event contact: Jagerynn Ting Verano
Posted August 27, 2026
Informal Geometry and Topology Seminar Questions or comments?
3:30 pm Lockett Hall 233TBD
TBD (SPEAKER TBD AS WELL)
Posted September 1, 2026
Control and Optimization Seminar Questions or comments?
10:30 am – 11:20 am Zoom: https://lsu.zoom.us/j/98176468969
Jun Liu, University of Waterloo, Canada
TBA
Posted September 7, 2026
until Saturday, February 27, 2027 University of Louisiana at LafayetteScientific Computing Around Louisiana (SCALA)