Date Event Type Event Name Abstract
11/14/2018 Mathematical Biology Seminar Biodiversity maintenance, conservation, and ecosystem effects of large mammalian seed dispersers Explaining the maintenance of tropical forest diversity under the countervailing forces of drift and competition poses a major challenge to ecological theory. Janzen-Connell effects, in which host-specific natural enemies restrict the recruitment of juveniles near conspecific adults, provide a...
11/14/2018 Mathematics Education Seminar Group theory via a rectangle tethered up to homotopy by strings or strip: from middle school to general education to abstract algebra
11/13/2018 Number Theory Seminar Eichler integrals and quantum modular forms In this talk, I will introduce Eichler integrals, and discuss some recent connections with quantum modular forms.
11/10/2018 to 11/11/2018 Conference Cascade Topology Seminar The 61st Cascade Topology Seminar will take place at the University of Oregon on November 10 and 11, 2018. For details, please go to https://math.uoregon.edu/seminars/cascade
11/07/2018 Mathematical Biology Seminar Microbial network estimation using bias-corrected graphical lasso With the increasing availability of microbiome 16S data, network estimation has become a useful approach to studying the interactions between Network estimation on a set of variables is frequently explored using graphical models, in which the relationship between two variables is modeled via their...
11/07/2018 Mathematics Education Seminar Discussion of Proofs that Provide Insight by Keith Weber We will discuss this 2010 paper in the journal For the Learning of Mathematics in which author Keith Weber describes mathematical proofs that provide insights by reconceiving mathematical domans or by introducing new methods.
11/06/2018 Number Theory Seminar Continuous families of continued fraction maps Regular continued fractions appear in many settings. Gauss (1812) determined an invariant probability measure for their underlying interval map, but never explained how. Ito-Nakada-Tanaka (1977) gave a simple method, using a 2-dimensional system. Nakada (1981) introduced an infinite family of...
11/05/2018 Department Colloquium Mathematical Creativity in Proving and Problem Solving - Use of the Creativity-in-Progress “Rubric” (CPR) Creativity is one of the most important aspects of professional mathematicians’ work and it plays a crucial role in the development of mathematics. However, there is little discussion of mathematical creativity in undergraduate mathematics courses, especially in terms of explicitly valuing students...
11/05/2018 Applied Mathematics and Computation Seminar Please note unusual day (Monday) for this event. Title: Dynamic Monge-Kantorovich equations modeling congested and ramified optimal transportation problems Recently we derived a novel formulation called the Dynamic Monge-Kantorovich equations for the simulation of optimal transportation problems, and in particular the Wasserstein-1 OT. An extension of this model considers a time derivative of the transport density that grows as a power law of the...
11/05/2018 Analysis Seminar Attend the talk by Mario Putti in AMC Seminar
11/05/2018 Geometry-Topology Seminar Computational Methods for Finding Relative Spherical Pictures Given a group presentation, an element of the second homotopy group of its associated 2-complex can be represented by a special planar graph called a "picture". Of recent interest is an analogous construction associated to relative group presentations. Theoretical techniques can often determine...
11/02/2018 to 11/09/2018 Applied Mathematics and Computation Seminar Taylor Dispersion: Evolution from the Initial Condition This is joint work with Ehsan Taghizadeh. After nearly 65 years of research on Taylor dispersion and literally thousands of papers on the subject, it is reasonable to ask if there is anything interesting left to be said about it. However, there still remains one outstanding problem in Taylor...
11/01/2018 Student Event Research Ready The process of getting involved in undergraduate research or creative work with a faculty mentor can be intimidating, especially for students who are new to OSU. We’re here to help! Join us for a workshop where we’ll discuss the benefits of working with a professor at OSU and how to identify and...
11/01/2018 External How Big Is Infinity? Did you know that infinity comes in different sizes? In a creative burst lasting six years, the nineteenth-century German mathematician Georg Cantor almost single-handedly created an entire field of mathematics devoted to understanding infinity. By revisiting the most basic techniques for comparing...
10/31/2018 Mathematical Biology Seminar None
10/31/2018 Mathematics Education Seminar Part 2: Continued Discussion of Weber and Alcock's Semantic and Syntactic Proof Productions
10/30/2018 Number Theory Seminar Eta-quotients of squarefree level and elliptic curves We show that a sufficient condition of Newman for an eta-quotient to be modular over the group Gamma_0(N) is in fact necessary for modularity over Gamma_1(N) when N is coprime to 6. Using this, we then give necessary and sufficient conditions for existence of eta-quotients in spaces of holomorphic...
10/29/2018 Department Colloquium Minimal blowup data for potential Navier-Stokes singularities on the half-space The existence of minimal blowup-generating initial data, under the assumption that there exists an initial data leading to finite-time singularity, has been studied by Rusin and Sverak (2011), Jia and Sverak (2013), and Gallagher, Koch and Planchon (2013, 2016) in several critical spaces on the...
10/29/2018 Analysis Seminar Vorticity geometry and the global regularity problem for the 3D incompressible Navier-Stokes equations Whether or not singularities develop in the solution of the unforced 3D incompressible Navier-Stokes equations (NSEs) still remain an open problem, yet there is extensive literature on the sufficient conditions to the regularity of solutions of NSEs. In this talk, I will start with a brief survey...
10/29/2018 Geometry-Topology Seminar Ricci-Positive Metrics on Arbitrary Connected Sums on Arbitrary Products of Spheres Given a smooth manifold, does it admit a Riemannian metric with positive Ricci curvature? The list of examples for which the answer is affirmative is not very long: Kähler manifolds with positive definite first Chern class, homogeneous spaces (e.g. spheres and projective spaces), and a handful of...