The Fundamental Group of the Menger Sponge and the Towers of Hanoi Hanspeter Fischer Ball State University Professor of Mathematics “The classical fractal known as the "Menger sponge" is what remains of a solid cube after drilling   infinitely many (ever... Read More

Variations in the Practical Predictability of Severe Weather Events Due to Model Resolution and Storm Environment Ryan Sobash University of Wisconsin-Madison Visiting Assistant Professor "As computing power has increased, numerical weather prediction (NWP) models are routinely being run with finer... Read More

1-Manifolds Galore! Laurence Siebenmann University of Paris-SUD Professor of Mathematics “I will present a combinatorial classifcation, up to homeomorphism, of all simply connected, separable, non-Hausdorff, 1-dimensional  manifolds (possibly with boundary), each having only finitely many singular points. These often occur... Read More

Automatic, Multiple Assessment Options in Undergraduate Math and Science Education Jonathon Kahl University of Wisconsin-Milwaukee Professor of Atmospheric Science “Since 2008, automatic, multiple assessment options have been utilized in selected undergraduate meteorology courses at the University of Wisconsin– Milwaukee. Motivated... Read More

Some Unitary Representations of R. Thompson's Groups F and T Vaughan Jones Vanderbilt University Stevenson Distinguished Professor Fields Medal Recipient “Thompson’s groups are groups of piecewise linear homeomorphisms of the  interval and circle where all the non-smooth points are dyadic... Read More

Diffusion Approximations and Optimal Control of Queueing Systems in Heavy-Traffic Ananda Weerasinghe Iowa State University Professor of Mathematics “The method of diffusion approximations provides a powerful tool to analyze complex queueing systems under ``heavy traffic conditions.’’ We first introduce such... Read More

Some Questions in Harmonic Analysis Involving Curvature Betsy Stovall University of Wisconsin-Madison Assistant Professor of Mathematics “We will describe some open and recently solved questions in Harmonic Analysis where curvature plays a crucial role. In particular, we will discuss how... Read More

Wiener's Lemma and Applications Qiyu Sun University of Central Florida Professor of Mathematics “The classical Wiener's lemma states that if f(x) is a function with an absolutely convergent Fourier series, which nowhere vanishes for real arguments, 1/f(x) has an absolutely... Read More

Maximal Subgroups in Direct Products of Groups Dr. Dandrielle Lewis University of Wisconsin-Eau Claire Associate Professor of Mathematics “Given a direct product of groups, G and H, and information on the subgroups of G and H, what can one say... Read More

Borsuk-Ulam Type Theorems and Existence of Equilibria in Games with Incomplete Information Stanislaw Spiez Institute of Mathematics of the Polish Academy of Sciences “In 1968, R. Aumann, M. Mashler and R. Sterns proved that any undiscounted infinitely repeated two-person zero-sum... Read More