Date Event Type Event Name Abstract
05/24/2017 Mathematical Biology Seminar Improving Min Hash for Metagenomic Classification Min hash and bloom filters are two relatively new probabilistic techniques that seek to provide fast and low memory approximate answers to queries of extremely large data sets. In this talk, I will discuss some recent work with Hooman Zabeti in which we improve a probabilistic estimate of the...
05/23/2017 Number Theory Seminar Functional Equations and Stabilities In this talk, we introduce the historic background for functional equations and their stabilities. We use the results on functional equations to investigate quasi-beta-normed space, fuzzy normed space and then deal with a sextic functional equation and its stability on the fuzzy anti-normed space...
05/22/2017 Analysis Seminar Stochastic Methods for Hyperbolic Equations Of the three classical examples of PDE's, the wave equation is the least amenable to be solved utilizing stochastic methods. Recent articles in the literature are attempting to bridge this gap. In this talk, I will present results from the paper by Sourav Chatterjee (arXiv:1306.2382v1) illustrating...
05/22/2017 Geometry-Topology Seminar Hyperbolic Groups are Automatic The theory of automatic groups utilizes the geometry of the Cayley graph and the theory of formal languages to define a broad class of groups with strong computational properties. In particular, automatic groups have quadratic Dehn function, and so the word problem for these groups has quadratic...
05/19/2017 Applied Mathematics and Computation Seminar Discontinuous Galerkin Methods and Geostrophic Adjustment Discontinuous Galerkin (DG) methods constitute a promising and relatively new class of methods for computing numerical solutions of partial differential equations. In a simple setting related to multi-layer modeling of ocean circulation, an analysis shows that DG methods are highly accurate in...
05/16/2017 Milne Lecture On Computational Thinking, Inferential Thinking and Data Science The rapid growth in the size and scope of datasets in science and technology has created a need for novel foundational perspectives on data analysis that blend the inferential and computational sciences. That classical perspectives from these fields are not adequate to address emerging problems in...
05/15/2017 Analysis Seminar Introduction to Brown-Douglas-Fillmore Theory This is an expository talk centered on Brown-Douglas-Fillmore theory. We call an operator A on a separable Hilbert space essentially normal if AA*-A*A is a compact operator. It is easy to check that the sum of a normal and a compact is essentially normal. The opposite is not true — for example,...
05/12/2017 Applied Mathematics and Computation Seminar Examining pore-scale flow solutions for impact on upscaled results of coupled flow and transport Modeling pore-scale processes is important for understanding the large scale flow and transport models in subsurface. In particular, pore-scale changes (e.g., due to phase transitions or reactive transport ) impact the porescale flow patterns, and impact the crucial large-scale flow parameters such...
05/10/2017 Mathematical Biology Seminar The Tragedy of the Commons in the Chemostat (part 2) We present a proof of principle for the phenomenon of the Tragedy of the Commons, introduced by Lloyd in 1838, later revisited by Hardin in 1968, and currently at the center of many theories of the evolution of cooperation. The setup is a chemostat (aka bioreactor) with fluctuating operating...
05/10/2017 Student Event How to deal with disruptive students This event within MTH 599 series is open to all Mathematics graduate students.
05/09/2017 Number Theory Seminar Improving the efficiency of the Divided Cell Algorithm I will begin by reviewing the strong connection between the role of continued fractions in homogeneous Diophantine approximation and the use of divided cells to answer inhomogeneous questions. I will then present joint work with Richard Bumby that has strengthened this connection in a way that has...
05/09/2017 Probability Seminar Spectral Clustering for Dynamic Block Models One of the most common and crucial aspects of many network data sets is the dependence of network link structure on time. In this work, we consider the problem of finding a common clustering structure in time-varying networks. We also propose an extension of the static version of nonparametric...
05/08/2017 Colloquium Describing Group Actions without Group Theory A contemporary adaption of Riemann's Existence Theorem provides a computational group theoretical way to determine the different ways in which a finite group G can act faithfully and topologically on a compact Riemann surface S of genus σ≥2 . Unfortunately, for large σ and for structurally complex...
05/08/2017 Geometry-Topology Seminar The Intersection Graph Conjecture for Tree and Loop Diagrams A chord diagram is a circle with chords going across it connecting 2 points on the boundary. You can associate to a chord diagram a graph with vertices representing the chords and an edge between them if the chords intersect in the chord diagram, called the intersection graph. A question is "If 2...
05/05/2017 Applied Mathematics and Computation Seminar Shooting Methods for Finding Eigenvalues and Eigenfunctions of Regular and Singular Sturm-Liouville Problems Sturm-Liouville eigenvalue problems arise naturally when separation of variables, variational methods, or other considerations are used to solve technical problems in engineering, physics, biology, and the social sciences. Explicit (closed form) evaluation of eigenvalues and eigenfunctions is...
05/04/2017 Applied Mathematics and Computation Seminar PNW SIAM Section Seminar We are pleased to announce the third talk in the SIAM PNW Section 2016-17 Seminar Series. See https://sites.google.com/site/siampnwsection/home for more information about the section. Who: Prof. Ralph Showalter, Mathematics, Oregon State University When: Thursday, May 4, 3pm (PST) Where: STAG 160 (...
05/02/2017 Student Event Lonseth Poster Session A graduate student poster session/competition will be held following the Lonseth Lecture on Tuesday, May 2. The presenters are: Azhar Alhammali & Malgorzata Peszynska, "Elliptic and Parabolic Variational Inequalities: Solvers and Applications" Zachary Barry, "Error Contribution of a...
05/02/2017 Lonseth Lecture Lonseth Lecture Series Many different events impact your decisions (note the plural) to continue your studies in mathematics. The solitary work that you perform when you do homework, the interactions with peers and the feedback from your instructors all play a role in your self-assessment. These self-assessments continue...
05/01/2017 Geometry-Topology Seminar Ricci-Positive Metrics on Connected Sums of Projective Spaces For a fixed compact, smooth manifold M, one can ask if M admits a Riemannian metric for which the sectional curvatures, Ricci curvatures, or scalar curvature have a constant sign. The sign of the sectional curvatures places a significant restriction on the topology of M. If positive, Gromov shows...
05/01/2017 Analysis Seminar The Tragedy of the Commons in the Chemostat We present a proof of principle for the phenomenon of the Tragedy of the Commons, introduced by Lloyd in 1838, later revisited by Hardin in 1968, and currently at the center of many theories of the evolution of cooperation. The setup is a chemostat (aka bioreactor) with fluctuating operating...

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