Thursday, September 21st, 2017

Fibonacci at Bucknell!

Leonardo of Pisa (a.k.a Fibonacci) has a remarkable connection with Bucknell, and to celebrate this fact we are holding an interdisciplinary conference on October 14. Featured speakers include: Mario Livio – an astrophysicist and author of popular science books, Keith Devlin – NPR’s “Math Guy” and the author of numerous popular mathematics books, William Goetzmann – Director of the International Center for Finance, Yale University This event will be in the Langone Center from 10:00 a.m. until 2:30 p.m. Lunch tickets are available in Olin 380, or by writing to

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Friday, September 15th, 2017

Student Talk: Jimmy Chen, September 21 at noon in Olin 268

Title: Efficiency Of Non-Compliance Chargeback Mechanisms In Retail Supply Chains Abstract: In practice, suppliers fill retailers’ purchase orders to the fill-rate targets to avoid the non-compliance financial penalty, or chargeback, in the presence of service level agreement. Two chargeback mechanisms – flat-fee and linear – have been proven to effectively coordinate the supply chain in a single-period setting. However, the mechanisms’ efficiency, the incurred penalty costs necessary to coordinate the supply chain, have not been studied yet. Since retailers are often accused of treating chargeback as an additional source of revenue, this study compares the expected penalties resulted from the […]

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Thursday, August 31st, 2017

Student Talk: Pete Brooksbank September 7 @ noon in Olin 268

Title: What Do You Mean, It’s Hard? Abstract: Suppose someone gives you a computer and asks you to perform one of the following tasks: solve a 17 × 17 × 17 Rubik’s cube, or decide if a given list of 100 integers can be broken into two parts having equal sums. If your life depended on it, which task would you choose? Which is harder, computationally? In 1971, Stephen Cook proposed a strong measure of efficiency – polynomial time, or simply P – as a desirable standard to which we should hold solutions to computational problems. Task A is an instance […]

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Friday, April 21st, 2017

Student Talk Series: Eva Strawbridge @ noon in Olin 268

  Title:  Fluid Flow Around Slender Bodies in Viscous Fluids: From Swimming Worms to Bacterial Carpets Abstract:   There are many biologically relevant situations which involve long slender bodies (e.g. worms, flagella, bacterial bodies, etc.) where it is important to understand the dynamic interactions of the body and the low Reynolds number fluid in which it moves. In this presentation, I will be discussing applications of the method of regularized stokeslets to periodically moving bodies in fluids. These models have applications to the study of locomotion as well as fluid mixing.

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Friday, April 7th, 2017

Student Talk Series: Sergei Tabachnikov 4/13 @ noon in Olin 268

Title:  Proofs (not) from the Book Abstract:  The eminent mathematician of the 20th century, Paul Erdos, often mention “The Book” in which God keeps the most elegant proof of every mathematical theorem. So, attending a mathematical talk, he would say: “This is a proof from The Book”, or “This is a correct proof, but not from The Book”. M. Aigner and G. Ziegler authored the highly successful “Proofs from THE BOOK” (translated into 13 languages). In this talk, I shall present several proofs that are not included in the Aigner-Ziegler book but that, in my opinion, could belong to “The […]

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Friday, March 24th, 2017

Student Talk Series: Carina Curto 3/30 @ noon in Olin 268

Title:  What can topology tell us about the neural code? Abstract:  Cracking the neural code is one of the central challenges of neuroscience. Neural codes allow the brain to represent, process, and store information about the outside world. Unlike other types of codes, they must also reflect relationships between stimuli, such as proximity between locations in an environment. In this talk, I will explain why algebraic topology provides natural tools for understanding the structure and function of neural codes.

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Tuesday, March 7th, 2017

Student Talk Series: Joe Lauer 3/9 @ noon in Olin 268

Title:  The Mathematics of Soap Films Abstract:  Every child knows that when you blow bubbles the surface that results is a sphere. But why? We’ll talk about this, more exotic examples, and a little bit about the group of Princeton mathematicians that became obsessed with soap films in the 1960s.

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Friday, February 17th, 2017

Distinguished Visiting Professor Talk: Il Bong Jung 2/23 @ 4 pm in Olin 372

Title:  Weighted shifts on directed trees Abstract: The main goal of this research is to implement some methods of graph theory into operator theory. We do it by introducing a new class of Hilbert space operators, which we propose to call weighted shifts on directed trees. We have studied the structure of these operators since 2012 and obtained some remarkable results about those operators. In this talk we discuss some of the established properties for such operators, for examples, normality, hyponormality, and subnormality, etc. It is well-known that the subnormality of Hilbert space operators is closely related to Stieltjes moment […]

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Wednesday, February 15th, 2017

Student Talk Series: Abby Hare-Harris 2/16 @ noon in Olin 268

Title:  Beyond Standard Scores:  Using Item-level Responses From Clinical Measures to Detect Atypical Developmental Patterns Abstract:  Developmental deviance (DDEV) refers to the non-sequential attainment of milestones within a developmental domain. This observation is in contrast to developmental delay (DD), where milestones are reached in the typical sequence, but the timeline of attainments is delayed. There is evidence that DDEV is associated with certain neurobehavioral diagnoses, such as autism spectrum disorder (ASD). Clinically, the attainment of developmental milestones is assessed through standardized measures of developmental domains. Many psychometric tests are arranged hierarchically, and on the surface, two individuals with the same […]

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Friday, January 27th, 2017

Student Talk Series: Christy Hamlet 2/2 @ noon in Olin 268

Title: Modeling lamprey swimming with mathematics and computation Abstract: Locomotion — swimming, running, flying — is one of the most basic animal behaviors. In order for an animal (like a lamprey) to swim, a lot has to happen, including neural signaling, muscle contractions, interactions between the body and the water, and adjustments from sensory feedback. How do we use mathematics to better understand the underlying mechanisms that drive locomotion? We will explore how we can use mathematical models to describe these individual systems and then coordinate the systems to produce a naturally emerging behavior in computer simulations of swimming lampreys.  

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