2023
Wednesday, March 15, 2023 RKC 111 12:00 pm – 1:00 pm EDT/GMT-4 We all have an intuitive notion of 'distance' between two numbers. For example, we might say that the distance between the numbers 3 and 5 is 2, and the distance between -5 and 1 is 6. But what do we really mean by 'distance'? Are there other ways to measure numbers? It turns out that the answer is yes: for every prime number p, there is a way to measure numbers in terms of their divisibility by p. In doing this, we are led to the world of "p-adic numbers", a strange place where all triangles are isosceles and where every point in a circle is its center. The theory of p-adic numbers permeates nearly all aspects of modern number theory. In this talk, we will define and gain intuition for the p-adic numbers and see some of their applications to problems in number theory. Rylan completed his bachelor's degree in mathematics and music performance at Bard College, where he was also a cellist in the conservatory. He obtained a master's degree from the University of Cambridge, where he also performed with the Cambridge Philharmonic, and a PhD from UMass Amherst. Rylan currently teaches at Union College in Schenectady, New York. His research is in algebraic number theory and arithmetic geometry. |
Wednesday, March 8, 2023
James Marshall, Sarah Lawrence College
RKC 111 12:00 pm – 1:00 pm EST/GMT-5 Since the 1920s, physicists and philosophers have been trying to understand the strangeness of the subatomic world as revealed by quantum theory, but it wasn't until the 1980s that computer scientists first began to suspect that this strangeness might represent a source of immense computational power. This realization was soon followed by key theoretical advances, including the discovery of algorithms that harness the quantum phenomena of superposition and entanglement, enabling quantum computers in principle to solve certain problems far more efficiently than any conventional computer. Around the same time, researchers built the first working quantum computers, albeit on a very small scale. Today the multidisciplinary field of quantum computing lies at the intersection of computer science, mathematics, and physics, and is one of the most fascinating areas in science, with potentially far-reaching consequences for the future. In this talk I will give an overview of the basic mathematical ideas behind quantum computing, and use them to illustrate two particularly interesting results: the quantum search algorithm, and quantum teleportation. |
Wednesday, February 8, 2023 RKC 111 12:00 pm – 1:00 pm EST/GMT-5 Magic squares are mathematical structures that have been known since ancient times; most likely many of their properties are still left undiscovered. Magic squares are an ideal topic for mathematical exploration and discovery with participants of all levels. Since 2020, Global Math Circle has carried out this activity with various groups. This topic was the foundation of a whole circle project in Colombia. We made five versions in which children of the United States 2020-I, 2022-II, Colombia 2020-I (urban online), Colombia/Peru 2021-II (urban online), 2022-II Colombia (Rural Face-to-face). Exploration of magic squares lead to discussions ranging from basic arithmetic, combinatorics, geometry, vector spaces, and more. We want to show you how to use magic squares as a springboard topic to get at larger mathematical explorations with students of diverse backgrounds and readiness levels. |
Wednesday, February 1, 2023 Welcome Back |