Colloquium Schedule

Date	Speaker	Affiliation	Title  (click title to see abstract)
September 3	Iva Antoncic	Univ. of Primorska	On the Half-Arc-Transitivity of Quartic Weak Metacirculants
September 10	Ellie Kennedy	NAU	A Flipped Classroom Study in Calculus II
September 17	Charles Biles	Humboldt State Univ.	A History of Congressional Apportionment: Bringing Down the House
September 24	Michael Falk	NAU	Discrete models of hyperplane arrangements
October 1	Steve Wilson	NAU	The Ring of Fire solved by Rocks and Fishes
October 8	Shannon Guerrero	NAU	The Professional Development of Irish Teachers in Project Maths: An Outsider’s Perspective
October 17	Dana Ernst	NAU	An Iterated Prisoner's Dilemma
October 22	Jin Wang	NAU	Effect of Kurtosis on Efficiency of Multivariate Medians
October 29	Janet McShane	NAU	An Introduction to Hermitian Codes (sabbatical presentation)
November 5	Terry Crites	NAU	Disequilibrium, Intellectual Need, and Problem Solving
November 12	Michael Falk	NAU	A nonrealizable arrangement group
November 19	Mark Goresky	IAS Princeton	A Hollywood Celebrity, the “Bad Boy” of Music, and the History of Modern Wireless Communications
November 26	Sarah Gilyard	NAU	Calculus of Variations and the application to Curves of Fastest Descent (Brachistochrone Curves)
December 3	Steve Wilson	NAU	Three Vignettes of Elementary Mathematics

 

Weekly Seminars

Algebra, Combinatorics, Geometry, Topology (ACGT) Seminar

Tuesdays, 12:40 - 1:40 pm, AMB 164

This week: Speaker: Michael Falk (NAU), Title: A Catalan sighting: representations of sl₂.

Abstract: In this “one-off” talk, I’ll sketch some of the (quite simple and beautiful) theory of representations of sl2(C), in order to exhibit yet another appearance of the Catalan numbers. Time permitting I’ll describe a curious Diophantine problem with interesting symmetry, that arose in our recent work (with A. Varchenko) about resonant weights in sl₂ discriminantal arrangements. Dane Jacobson will continue his talk about Spinpossible next Tuesday.

Applied Math Seminar

Thursdays, 12:45 - 1:35 pm, AMB 164

This week: Speaker Todd Wolford, Title: A Cantor Set of Nonconvergence, continued.

Abstract: I will present a brief paper published by my PhD advisor and another former faculty member at New Mexico Tech. The paper addresses the question: If the function is such that there are numbers a<b<c<d such that the intervals [a,b] and [c,d] are both mapped continuously onto [a,d] while the interval (b,c) is mapped (either immediately or asymptotically) to fixed points then what can we say about the iterative sequences of points that start in [a,d] and do not converge to a fixed point? (Possible orbits?, Measure?, Density?)

Friday Afternoon Undergraduate Mathematics Seminar (FAMUS)

Fridays, 3:00 – 4:00 pm, AMB 164. (refreshments)