BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Claremont Center for the Mathematical Sciences - ECPv6.15.17.1//NONSGML v1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH X-WR-CALNAME:Claremont Center for the Mathematical Sciences X-ORIGINAL-URL:https://colleges.claremont.edu/ccms X-WR-CALDESC:Events for Claremont Center for the Mathematical Sciences REFRESH-INTERVAL;VALUE=DURATION:PT1H X-Robots-Tag:noindex X-PUBLISHED-TTL:PT1H BEGIN:VTIMEZONE TZID:America/Los_Angeles BEGIN:DAYLIGHT TZOFFSETFROM:-0800 TZOFFSETTO:-0700 TZNAME:PDT DTSTART:20190310T100000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0700 TZOFFSETTO:-0800 TZNAME:PST DTSTART:20191103T090000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0800 TZOFFSETTO:-0700 TZNAME:PDT DTSTART:20200308T100000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0700 TZOFFSETTO:-0800 TZNAME:PST DTSTART:20201101T090000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0800 TZOFFSETTO:-0700 TZNAME:PDT DTSTART:20210314T100000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0700 TZOFFSETTO:-0800 TZNAME:PST DTSTART:20211107T090000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0800 TZOFFSETTO:-0700 TZNAME:PDT DTSTART:20220313T100000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0700 TZOFFSETTO:-0800 TZNAME:PST DTSTART:20221106T090000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0800 TZOFFSETTO:-0700 TZNAME:PDT DTSTART:20230312T100000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0700 TZOFFSETTO:-0800 TZNAME:PST DTSTART:20231105T090000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0800 TZOFFSETTO:-0700 TZNAME:PDT DTSTART:20240310T100000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0700 TZOFFSETTO:-0800 TZNAME:PST DTSTART:20241103T090000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20230919T150000 DTEND;TZID=America/Los_Angeles:20230919T160000 DTSTAMP:20260406T005820 CREATED:20230915T191657Z LAST-MODIFIED:20230918T204921Z UID:3237-1695135600-1695139200@colleges.claremont.edu SUMMARY:Claremont Topology Seminar: Reginald Anderson (CMC) DESCRIPTION:Title: Cellular resolutions of the diagonal and exceptional collections for toric Deligne-Mumford stacks \nAbstract: Beilinson gave a resolution of the diagonal for complex projective space which yields a strong\, full exceptional collection of line bundles. Bayer-Popescu-Sturmfels generalized Beilinson’s result to a cellular resolution of the diagonal for what they called “unimodular” toric varieties (a more restrictive condition than being smooth)\, which can also be extended to smooth toric varieties and global quotient toric DM stacks of a smooth toric variety by a finite abelian group\, if we allow our resolution to have cokernel which is supported only along the vanishing of the irrelevant ideal. Here we show implications for exceptional collections of line bundles and a positive example for the modified King’s conjecture by giving a strong\, full exceptional collection of line bundles on a smooth\, non-unimodular nef-Fano complete toric surface. URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-reginald-anderson-cmc/ LOCATION:Fletcher 110\, Pitzer College\, 1050 N Mills Ave\, Claremont\, CA\, 91711\, United States CATEGORIES:Topology Seminar ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20230912T150000 DTEND;TZID=America/Los_Angeles:20230912T160000 DTSTAMP:20260406T005820 CREATED:20230913T073733Z LAST-MODIFIED:20231006T053002Z UID:3222-1694530800-1694534400@colleges.claremont.edu SUMMARY:Claremont Topology Seminar: Robert Bowden (HMC) DESCRIPTION:Title: Chebyshev Threadings in Skein Algebras for Punctured Surfaces \nAbstract: Skein algebras are algebras of links in a surface quotiented by diagram-based equivalence relations based on the Kauffman bracket. In the case of surfaces with punctures\, the skein algebra is generated by links as well as arcs between the punctures\, and there are additional skein relations for the arcs. We examine the algebraic structure of the punctured case\, finding a description of the central elements at certain roots of unity. Our construction is closely related to the one for the usual skein algebra\, where central elements come from threading links by Chebyshev polynomials. URL:https://colleges.claremont.edu/ccms/event/chebyshev-threadings-in-skein-algebras-for-punctured-surfaces-robert-bowden-hmc/ LOCATION:Fletcher 110\, Pitzer College\, 1050 N Mills Ave\, Claremont\, CA\, 91711\, United States CATEGORIES:Topology Seminar ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20211026T150000 DTEND;TZID=America/Los_Angeles:20211026T160000 DTSTAMP:20260406T005820 CREATED:20210914T225152Z LAST-MODIFIED:20211011T195808Z UID:2356-1635260400-1635264000@colleges.claremont.edu SUMMARY:Topology Seminar DESCRIPTION: URL:https://colleges.claremont.edu/ccms/event/topology-seminar-2021-09-21-2021-10-26/2021-10-26/ LOCATION:Zoom meeting\, United States CATEGORIES:Topology Seminar ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20211012T150000 DTEND;TZID=America/Los_Angeles:20211012T160000 DTSTAMP:20260406T005820 CREATED:20210914T225152Z LAST-MODIFIED:20211011T195957Z UID:2355-1634050800-1634054400@colleges.claremont.edu SUMMARY:Topology Seminar -- Matthew vonAllmen DESCRIPTION:Title: Untying Knots with Neural Nets \nAbstract: Neural networks can transform 3-dimensional data in a manner reminiscent of an ambient isotopy. With some modifications\, a neural network can be trained to manipulate the vertices of a knot while respecting its topological structure. We use the discrete Mo ̈bius energy as a loss function to incentivize a neural network to smooth out curves in a knot\, without performing illegal operations. By introducing unconventional neural network layers\, we are able to untwist highly tangled polygonal knots until a human can visually recognize whether they are topologically equivalent to the unknot. URL:https://colleges.claremont.edu/ccms/event/topology-seminar-2021-09-21-2021-10-12/ LOCATION:Zoom meeting\, United States CATEGORIES:Topology Seminar ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20211005T150000 DTEND;TZID=America/Los_Angeles:20211005T160000 DTSTAMP:20260406T005820 CREATED:20210914T225152Z LAST-MODIFIED:20210914T230121Z UID:2354-1633446000-1633449600@colleges.claremont.edu SUMMARY:Topology Seminar -- Jim Hoste DESCRIPTION:Jim Hoste will do an interpretive knot dance. URL:https://colleges.claremont.edu/ccms/event/topology-seminar-2021-09-21-2021-10-05/ LOCATION:Zoom meeting\, United States CATEGORIES:Topology Seminar ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20210928T150000 DTEND;TZID=America/Los_Angeles:20210928T160000 DTSTAMP:20260406T005820 CREATED:20210914T225152Z LAST-MODIFIED:20210914T225958Z UID:2339-1632841200-1632844800@colleges.claremont.edu SUMMARY:Topology Seminar -- Robert Bowden DESCRIPTION:Robert Bowden will tell us fantastic things he did at PSU. URL:https://colleges.claremont.edu/ccms/event/topology-seminar-2021-09-21/ LOCATION:Zoom meeting\, United States CATEGORIES:Topology Seminar ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20210921T150000 DTEND;TZID=America/Los_Angeles:20210921T160000 DTSTAMP:20260406T005820 CREATED:20210914T225152Z LAST-MODIFIED:20210914T225937Z UID:2338-1632236400-1632240000@colleges.claremont.edu SUMMARY:Topology Seminar -- Sam Nelson DESCRIPTION:Sam Nelson will wow us with his maths. URL:https://colleges.claremont.edu/ccms/event/topology-seminar/ LOCATION:Zoom meeting\, United States CATEGORIES:Topology Seminar ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20210428T161500 DTEND;TZID=America/Los_Angeles:20210428T173000 DTSTAMP:20260406T005820 CREATED:20210204T004751Z LAST-MODIFIED:20210406T011522Z UID:2180-1619626500-1619631000@colleges.claremont.edu SUMMARY:Jennifer Franko Vasquez DESCRIPTION:Title: Puzzling Permutations \nAbstract: Permutations are one of the most fundamental notions in mathematics. In this talk\, we will discuss a visual representation of permutations and introduce some games one can play to help “see” different properties. These puzzling games can be used to provide insight into deeper mathematical content as well. Time permitting\, we will explore connections to topology and biology. This talk is based on joint work with Steven Dougherty and Michael Allocca. \nDr. Vasquez is a Professor of Mathematics at the University of Scranton. URL:https://colleges.claremont.edu/ccms/event/jennifer-franko-vasquez/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20210421T161500 DTEND;TZID=America/Los_Angeles:20210421T173000 DTSTAMP:20260406T005820 CREATED:20210204T004641Z LAST-MODIFIED:20210418T004801Z UID:2178-1619021700-1619026200@colleges.claremont.edu SUMMARY:Haydee Lindo DESCRIPTION:Title: Trace Ideals and Endomorphism Rings \nAbstract: In many branches of mathematics\, the full set of “functions” between two objects exhibits remarkable structure; it often forms a group and in some special cases it forms a ring. In this talk\, we will discuss this phenomenon in Commutative Algebra. In particular\, we will talk about the endomorphism ring formed by the homomorphisms from a module to itself by first looking at commuting square matrices. I’ll also introduce the trace ideal and explain its role in the question “What properties of a module does its endomorphism ring detect?” \nDr. Lindo is Assistant Professor at Harvey Mudd College. URL:https://colleges.claremont.edu/ccms/event/haydee-lindo/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20210414T161500 DTEND;TZID=America/Los_Angeles:20210414T173000 DTSTAMP:20260406T005820 CREATED:20210204T004536Z LAST-MODIFIED:20210326T180738Z UID:2176-1618416900-1618421400@colleges.claremont.edu SUMMARY:Jennifer Taback DESCRIPTION:Title: Groups\, Graphs and Trees \nAbstract: What do we mean by the geometry of a group? Groups seem like very abstract objects when we first study them\, and it’s natural to ask whether we can visualize them in some way. Given a group with a finite set of generators and relators\, I will describe a canonical way to construct a geometric model of that group\, called a Cayley graph. We will see many examples — both standard and unusual — and I will discuss some fundamental questions from the field of geometric group theory\, including whether this geometric model is well defined. One goal of this field of mathematics is to use the geometry of a group to provide insight into its algebraic structure\, and to use the algebraic properties of a group to draw conclusions about its geometry. This will be a very visual talk\, involving many examples of groups\, graphs\, and trees. \nDr. Jennifer Taback is Isaac Henry Wing Professor and Chair of the Mathematics Department at Bowdoin College. URL:https://colleges.claremont.edu/ccms/event/jennifer-taback/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20210407T161500 DTEND;TZID=America/Los_Angeles:20210407T173000 DTSTAMP:20260406T005820 CREATED:20210204T004426Z LAST-MODIFIED:20210324T171332Z UID:2174-1617812100-1617816600@colleges.claremont.edu SUMMARY:Alexandria Volkening DESCRIPTION:Title:\nHow do zebrafish get their stripes — or spots? \nAbstract:\nMany natural and social systems involve individual agents coming together to create group dynamics\, whether the agents are drivers in a traffic jam\, voters in an election\, or locusts in a swarm. Self-organization also occurs at much smaller scales in biology\, though\, and here I will focus on elucidating how brightly colored cells interact to form skin patterns in fish. Because they are surprisingly similar to humans genetically\, we will investigate zebrafish\, which are named for their dark and light stripes. Mutant zebrafish\, on the other hand\, feature variable skin patterns\, including spots and labyrinth curves. All these patterns form as the fish grow due to the interactions of tens of thousands of pigment cells. This leads to the question: how do mutations change cell behavior to create spotted zebrafish? In this talk\, we will combine different modeling approaches (including agent-based and continuum) and topological data analysis to help shed light on this question. More broadly\, we will explore how a combination of biological and mathematical approaches are being used to better understand how genes\, cell behavior\, and visible animal characteristics are related in fish. \nDr. Volkening is an NSF-Simons Fellow at the NSF-Simons Center for Quantitative Biology at Northwestern University URL:https://colleges.claremont.edu/ccms/event/alexandria-volkening/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20210331T161500 DTEND;TZID=America/Los_Angeles:20210331T173000 DTSTAMP:20260406T005820 CREATED:20210204T004224Z LAST-MODIFIED:20210312T000546Z UID:2172-1617207300-1617211800@colleges.claremont.edu SUMMARY:An ideal convergence: an example in noncommutative metric geometry (Prof. Konrad Aguilar) DESCRIPTION:Title: An ideal convergence: an example in noncommutative metric geometry \nAbstract: \nThe ability to calculate the distance between sets (rather than just distance between points) has found applications in geometry and group theory as well as various branches of applied mathematics. The Hausdorff distance and the Gromov-Hausdorff distance are standard distances used in these applications. Moreover\, a certain generalization of the Gromov-Hausdorff distance called the quantum Gromov-Hausdorff distance was built by M. A. Rieffel to answer some questions from physics about operator algebras\, which are generalizations of algebras of complex-valued square matrices. In another direction\, J.M.G. Fell introduced a notion of convergence of ideals of a given operator algebra. Can the quantum Gromov-Hausdorff distance also be used to establish convergence of the associated quotient algebras? We discuss this for certain operator algebras called approximately finite-dimensional (AF) C*-algebras\, which can be represented by infinite graphs called Bratteli diagrams where the ideals and quotients are represented by subgraphs. It is the movement of the quotient graphs with respect to the ideal graphs that motivates our question and its answer. The main example we discuss will be given by graph representations of irrational numbers built by their associated continued fractions. (This talk contains joint work with Samantha Brooker\, Frédéric Latrémolière\, and Alejandra López). \nProfessor Konrad Aguilar is Assistant Professor at Pomona College. URL:https://colleges.claremont.edu/ccms/event/konrad-aguilar/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20210324T161500 DTEND;TZID=America/Los_Angeles:20210324T173000 DTSTAMP:20260406T005820 CREATED:20210204T004055Z LAST-MODIFIED:20210312T000436Z UID:2170-1616602500-1616607000@colleges.claremont.edu SUMMARY:Our muscles aren't one-dimensional fibres (Prof. Nilima Nigam) DESCRIPTION:Title: Our muscles aren’t one-dimensional fibres. \nAbstract: Skeletal muscles possess rather amazing mechanical properties. They possess an intricate structure\, and behave nonlinearly in response to mechanical stresses. In the 1910s\, A.V. Hill observed muscles heat when they contract\, but not when they relax. Based on experiments on frogs he posited a mathematical description of skeletal muscles which approximated muscle as a 1-dimensional nonlinear and massless spring. This has been a remarkably successful model\, and remains in wide use. Recently\, we’ve realized that skeletal muscle is three dimensional\, has mass\, and fairly complicated structure. I’ll present some work on a mathematical model which captures some of this complexity. \nDr. Nilima Nigam is Professor at Simon Fraser University. URL:https://colleges.claremont.edu/ccms/event/nilima-nigam/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20210317T161500 DTEND;TZID=America/Los_Angeles:20210317T173000 DTSTAMP:20260406T005820 CREATED:20210204T003526Z LAST-MODIFIED:20210312T000508Z UID:2168-1615997700-1616002200@colleges.claremont.edu SUMMARY:Finding soap films in non-Euclidean geometry (Prof. David Bachman) DESCRIPTION:Title: Finding soap films in non-Euclidean geometry \nAbstract: In many computer graphics applications we approximate a smooth surface with one made up of tiny triangles. A common problem is to determine which way to move the vertices (the corners of the triangles)\, so that the total surface area decreases. If the boundary of the surface remains fixed\, this allows us to find the soap film surface spanned by that boundary curve. In Euclidean geometry this leads to the famous “cotan-Laplace formula.” After reviewing this formula we will introduce spherical and hyperbolic space\, and discuss a solution to the same problem in those geometries. \nDr. Bachman is Professor of Mathematics at Pitzer College and Director of the Claremont Center for the Mathematical Sciences. URL:https://colleges.claremont.edu/ccms/event/david-bachman/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20210303T161500 DTEND;TZID=America/Los_Angeles:20210303T173000 DTSTAMP:20260406T005820 CREATED:20210204T003334Z LAST-MODIFIED:20210221T214207Z UID:2166-1614788100-1614792600@colleges.claremont.edu SUMMARY:Ioana Dumitriu DESCRIPTION:Title: Spectral gap in random regular graphs and hypergraphs \nAbstract: Random graphs and hypergraphs have been used for decades to model large-scale networks\, from biological\, to electrical\, and to social. Various random graphs (and their not-so-random properties) have been connected to algorithms solving problems from community detection to matrix completion\, coding theory\, and various other statistics / machine learning fundamental questions; in the past decade\, this research area has expanded to include random hypergraphs. One of these special properties is the spectral gap for graph-associated matrices; roughly speaking\, it means that the main eigenvalue(s) are well-separated from the bulk and it guarantees strong connectivity properties. This talk will take a look at the spectra of adjacency / Laplacian matrices for some random regular models\, explain how we know that the spectral gap is there\, and connect spectral properties to the aforementioned applications. It will cover joint work with Gerandy Brito\, Kameron Decker Harris\, and Yizhe Zhu. \nIoana Dumitriu is a Professor of Mathematics at The University of California\, San Diego. URL:https://colleges.claremont.edu/ccms/event/ioana-dumitru/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20201118T161500 DTEND;TZID=America/Los_Angeles:20201118T173000 DTSTAMP:20260406T005820 CREATED:20200917T150401Z LAST-MODIFIED:20201109T195216Z UID:2033-1605716100-1605720600@colleges.claremont.edu SUMMARY:Prof. Gregory DeAngelo DESCRIPTION:Title: The Effect of Criminal Justice Decisions on Community Safety \nAbstract: During this talk we will\, time permitting\, examine several law enforcement actor’s impact on community safety\, including law enforcement\, prosecutors and judges. To start\, we examine the impact of law enforcement race and gender on use of force. We first show that conditioning on arrests has the potential to greatly impact the results obtained. Instead\, we make use of an instrumental variable approach to examine the as-if random assignment of officers to calls for service. Leveraging this randomness\, we identify the effect of officer race and gender on the likelihood that force is used during the call. Next\, we focus our attention on prosecutors and leverage a unique situation where prosecutors are no longer able to pursue low-level drug charges. In the absence of such charges\, we examine the impact of not prosecuting low-level drug offenses on drug overdoses and drug abuse admissions. Finally\, we examine the effect of an exogenous increase in judge salaries on the likelihood that cases are overturned on appeal. \nProf. Gregory DeAngelo is an Associate Professor of Economic Sciences at the Claremont Graduate University URL:https://colleges.claremont.edu/ccms/event/prof-gregory-deangelo/ CATEGORIES:Colloquium ORGANIZER;CN="Andrew Bernoff":MAILTO:ajb@hmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20201111T161500 DTEND;TZID=America/Los_Angeles:20201111T171500 DTSTAMP:20260406T005820 CREATED:20200820T205435Z LAST-MODIFIED:20201102T180630Z UID:1992-1605111300-1605114900@colleges.claremont.edu SUMMARY:Prof. Eva Kanso DESCRIPTION:Title: Sea star locomotion \nAbstract: The oral surface of sea stars (starfish) is lined with arrays of tube feet that enable them to achieve highly controlled locomotion on various terrains and to even gallop and bounce. The activity of the tube feet is orchestrated by a nerve net that is distributed throughout the body; there is no central brain. How such a decentralized nervous system produces a coordinated locomotion is yet to be understood. To examine the sensorimotor control underlying the sea star locomotory behavior\, we developed mathematical models of the biomechanics and sensorimotor control of the tube feet. In these models\, the feet are soft actuators that are coupled mechanically through their structural connection to the sea star body\, and whose power and recovery strokes are dictated by local sensori-feedback control loops. We found that these minimally-coupled tube feet coordinate to generate robust forward locomotion\, reminiscent of the crawling motion of sea stars. We also found that the sea star model can transition from crawling to bouncing\, and it can robustly locomote on various terrains\, and under various heterogeneity in the tube feet parameters and initial conditions\, akin to experimental observations. These findings improve our understanding of the Echinoderms decentralized nervous system and could lead to novel designs and control rules for autonomous robotic systems. \nProf. Eva Kanso is a Professor and the Z.H. Kaprielian Fellow in Aerospace and Mechanical Engineering at the University of Southern California. URL:https://colleges.claremont.edu/ccms/event/prof-eva-kanso/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20201104T161500 DTEND;TZID=America/Los_Angeles:20201104T173000 DTSTAMP:20260406T005820 CREATED:20200901T182037Z LAST-MODIFIED:20200910T152242Z UID:2018-1604506500-1604511000@colleges.claremont.edu SUMMARY:Prof. Sarah Marzen DESCRIPTION:Title: Training dynamical systems to predict their input \nAbstract: Evolved systems seem to predict their environment. Even bacteria can implicitly predict future concentrations of scarce sugar or antibiotics\, and emerging evidence suggests that even our retinae are able to predict what we see. How? We explore some basic design principles for what causes a system to predict its input\, finishing with a call to arms for mathematicians to develop a better framework for understanding input-dependent dynamical systems or recurrent networks. \nProf. Marzen is Assistant Professor of Physics at Claremont’s Keck Science Department. URL:https://colleges.claremont.edu/ccms/event/prof-sarah-marzen/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20201028T161500 DTEND;TZID=America/Los_Angeles:20201028T173000 DTSTAMP:20260406T005820 CREATED:20200910T153940Z LAST-MODIFIED:20201007T211225Z UID:2027-1603901700-1603906200@colleges.claremont.edu SUMMARY:Prof. Stephan Ramon Garcia DESCRIPTION:Title: Combinatorics and the Kitchen Sink \nAbstract: Numerical semigroups are simple combinatorial objects that lead to deep and subtle questions. We answer in one fell swoop virtually all asymptotic questions about factorization lengths in numerical semigroups. Surprisingly\, this uses tools from complex\, harmonic\, and functional analysis\, probability theory\, algebraic combinatorics\, and computer-aided design! Our results yield uncannily accurate predictions that agree with numerical computations\, along with some totally unexpected byproducts. \nThis work was partially supported by NSF Grant DMS-1800123. Joint work with A. Böttcher\, M. Omar\, C.O’Neill\, and Pomona undergraduate students T. Wesley (’21) and S.Yih (’18). \nProf. Garcia is the W.M. Keck Distinguished Service Professor and Professor of Mathematics at Pomona College URL:https://colleges.claremont.edu/ccms/event/prof-stephan-ramon-garcia/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Andrew Bernoff":MAILTO:ajb@hmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20201007T161500 DTEND;TZID=America/Los_Angeles:20201007T171500 DTSTAMP:20260406T005820 CREATED:20200820T205249Z LAST-MODIFIED:20200913T173147Z UID:1990-1602087300-1602090900@colleges.claremont.edu SUMMARY:Prof. Satyan Devadoss DESCRIPTION:Title: Unsolved Mathematics at Burning Man \nAbstract: Rising 12 feet tall with an 18-foot wingspan\, a 2-ton unfolding dodecahedron comes to life at Burning Man\, the world’s most influential large-scale sculpture showcase. The artwork is illuminated by 16\,000 LEDs\, requiring 6500 build-hours and $50\,000 in donated funds\, with an interior large enough to hold 15 people and fully-lined with massive mirrors. \nThis sculpture alludes to a tantalizing open problem in mathematics on unfolding polyhedra\, tracing its origins back 500 years to the Renaissance master Albrecht Dürer. We discuss the state-of-the-art for this geometric puzzle\, consider solutions to some higher-dimensional unfolding analogs\, and place this example in a larger quest to bring the edge of mathematical knowledge to the general public. \nProf. Devadoss is the Fletcher Jones Chair of Applied Mathematics and Professor of Computer Science at University of San Diego. URL:https://colleges.claremont.edu/ccms/event/prof-satyan-devadoss/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20200930T161500 DTEND;TZID=America/Los_Angeles:20200930T171500 DTSTAMP:20260406T005820 CREATED:20200820T205018Z LAST-MODIFIED:20200828T022601Z UID:1988-1601482500-1601486100@colleges.claremont.edu SUMMARY:Prof. Jemma Lorenat DESCRIPTION:Title: A competent translation/a pitiful bungle: The Foundations of Geometry \nAbstract: David Hilbert’s Grundlagen der Geometrie is a rare example of a historical mathematics text that is still profitably read today and continues to inspire research in mathematics\, computer science\, and philosophy. \nThe effort of publishing an English translation of Hilbert in 1902 involved a diverse swath of the American mathematical community. Edgar Jerome Townsend completed a first draft of his authorized translation in a few weeks\, but the process of creating a successful publication involved negotiations\, corrections\, and attention to detail that continued well after the first edition appeared in print. Meanwhile\, published and private texts that circulated around the English edition contained conflicting conclusions with respect to the quality of the translation\, the book’s audience\, and the parameters of a scholarly critique. This talk sheds light on American mathematics at a pivotal time in its history and raises questions about the language and form of mathematical texts that continue to be relevant today. \nProf. Lorenat is Assistant Professor at Pitzer College. URL:https://colleges.claremont.edu/ccms/event/prof-jemma-lorenat/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20200923T161500 DTEND;TZID=America/Los_Angeles:20200923T173000 DTSTAMP:20260406T005820 CREATED:20200921T222333Z LAST-MODIFIED:20200922T173826Z UID:2040-1600877700-1600882200@colleges.claremont.edu SUMMARY:Student Research Presentations II DESCRIPTION:4:20pm\nTitle: Measuring Publication Bias in Foreign Language Editions of Russian State-Owned Media Company RT\nPresenter: Benjamin Figueroa (CMC) \n4:30pm\nTitle:Multilingual Emoticon Prediction of Tweets about COVID-19\nPresenter: Stefanos Stoikos (Pomona)\, \n4:40pm\nTitle: Evaluating Word Embeddings on Low-Resource Languages\nPresenter: Nathan Stringham (Pomona)\, \n4:50pm\nTitle: An Epistemic Logic of Desires\, Part I\nPresenters: Rui-Jie Yew (Scripps) and Wendy Zhang (Scripps)\, \n5:00pm\nTitle: An Epistemic Logic of Desires\, Part II\nPresenters: Rui-Jie Yew (Scripps) and Wendy Zhang (Scripps)\, \nPresenters have a total of 10 minutes for talk and Q&A. URL:https://colleges.claremont.edu/ccms/event/student-poster-session-ii/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20200923T161500 DTEND;TZID=America/Los_Angeles:20200923T171500 DTSTAMP:20260406T005820 CREATED:20200921T223309Z LAST-MODIFIED:20200921T224529Z UID:2045-1600877700-1600881300@colleges.claremont.edu SUMMARY:Student Research Presentations III DESCRIPTION:4:20\nTitle: Nested Links\, Linking Matrices\, and Crushtaceans\nPresenter: Madeline Brown (Scripps) \n4:30\nTitle: Computing Cube Decisions for Backgammon Endgame Positions\nPresenter: Mathus Leungpathomaram (HMC) \n4:40\nTitle: The Limiting Spectral Measure for an Ensemble of Generalized Checkerboard Matrices\nPresenter: Jiahui Yu (Pomona) \n4:50\nTitle: The Stationary Distribution of Recombination\, Part I\nPresenters: Emma Kolesnik (Scripps)\, Sherry Hua (Pitzer)\, Ethan Ong (Pomona) \n5:00\nTitle: The Stationary Distribution of Recombination\, Part II\nPresenters: Emma Kolesnik (Scripps)\, Sherry Hua (Pitzer)\, Ethan Ong (Pomona) \n5:10\nTitle: The Stationary Distribution of Recombination\, Part III\nPresenters: Emma Kolesnik (Scripps)\, Sherry Hua (Pitzer)\, Ethan Ong (Pomona) \nPresenters have a total of 10 minutes for talk and Q&A URL:https://colleges.claremont.edu/ccms/event/student-research-presentations-iii/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20200923T161500 DTEND;TZID=America/Los_Angeles:20200923T171500 DTSTAMP:20260406T005820 CREATED:20200917T223556Z LAST-MODIFIED:20200923T230011Z UID:2036-1600877700-1600881300@colleges.claremont.edu SUMMARY:Student Research Presentations: I DESCRIPTION:4:20 pm\nTitle: Methodology of Global Sensitivity Analysis for Determination of Important Parameters in a Mathematical Model\nPresenter: An Do (CGU) \n4:30 pm\nTitle: Using Data Science to gain insights into the relationship between Metagenomics and Psychiatric Disorders\nPresenter: Tom Fu (HMC) \n4:40 pm\nTitle: Classifying time series data via manifold techniques\nPresenter: Adam Guo (Pomona) \n4:50 pm\nTitle: Finding stability within chaos: Part I\nPresenter: Rafa Martinez-Avial\, Siddharth Namachivayam (Pomona) \n5:00 pm\nTitle: Finding stability within chaos: Part II\nPresenter: Rafa Martinez-Avial\, Siddharth Namachivayam (Pomona) \nPresenters have a total of 10 minutes for talk and Q & A URL:https://colleges.claremont.edu/ccms/event/student-poster-session/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20200916T161500 DTEND;TZID=America/Los_Angeles:20200916T171500 DTSTAMP:20260406T005820 CREATED:20200813T145226Z LAST-MODIFIED:20200813T215229Z UID:1970-1600272900-1600276500@colleges.claremont.edu SUMMARY:Prof. Kiran Kedlaya DESCRIPTION:Title: Space vectors forming rational angles \nAbstract:\nWe classify all possible configurations of vectors in three-dimensional space with the property that any two of the vectors form an angle whose measure is a rational multiple of π. As a corollary\, we find all tetrahedra whose six dihedral angles are all rational multiples of π.While these questions (and their answers) are of an elementary nature\, their resolution will take us on a tour through cyclotomic number fields\, computational algebraic geometry\, and an amazing fact about the geometry of tetrahedra discovered by two physicists in the 1960s. Joint work with Sasha Kolpakov\, Bjorn Poonen\, and Michael Rubinstein. \nDr Kedlaya is Professor of Mathematics and the Stefan E. Warschawski Chair in Mathematics at the University of California\, San Diego. URL:https://colleges.claremont.edu/ccms/event/kiran-kedlaya/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20200909T161500 DTEND;TZID=America/Los_Angeles:20200909T171500 DTSTAMP:20260406T005820 CREATED:20200820T204513Z LAST-MODIFIED:20200821T163948Z UID:1984-1599668100-1599671700@colleges.claremont.edu SUMMARY:Prof. Sam Nelson DESCRIPTION:Title: Experimental Knot Music \nAbstract: In knot theory\, there are algebraic structures we can use to distinguish different types of knots and links. In this talk we will ask an unexpected question: what do they sound like? We will see a number of techniques I have been developing for interpreting knot-theoretic structures as elements of musical composition. \nProf. Nelson is Professor and Chair of the Department of Mathematical Sciences at Claremont McKenna College. URL:https://colleges.claremont.edu/ccms/event/prof-sam-nelson/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20200902T161500 DTEND;TZID=America/Los_Angeles:20200902T171500 DTSTAMP:20260406T005820 CREATED:20200813T143848Z LAST-MODIFIED:20200813T151646Z UID:1963-1599063300-1599066900@colleges.claremont.edu SUMMARY:Prof. Edray Goins DESCRIPTION:Title: Indiana Pols Forced to Eat Humble Pi\, The Curious History of an Irrational Number \nSpeaker: Prof. Edray Goins\, Pomona College \nIn 1897\, Indiana physician Edwin J. Goodwin believed he had discovered a way to square the circle\, and proposed a bill to Indiana Representative Taylor I. Record which would secure Indiana’s the claim to fame for his discovery. About the time the debate about the bill concluded\, Purdue University professor Clarence A. Waldo serendipitously came across the claimed discovery\, and pointed out its mathematical impossibility to the lawmakers. It had only be shown just 15 years before\, by the German mathematician Ferdinand von Lindemann\, that it was impossible to square the circle because π is an irrational number. This fodder became ignominiously known as the “Indiana Pi Bill” as Goodwin’s result would force π = 3.2. \nIn this talk\, we review this humorous history of the irrationality of π. We introduce a method to compute its digits\, present Lindemann’s proof of its irrationality (following a simplification by Miklós Laczkovich)\, discuss the relationship with the Hermite-Lindemann-Weierstrass theorem\, and explain how Edwin J. Goodwin came to his erroneous conclusion in the first place. URL:https://colleges.claremont.edu/ccms/event/edray-goins/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20200826T161500 DTEND;TZID=America/Los_Angeles:20200826T171500 DTSTAMP:20260406T005820 CREATED:20200813T144427Z LAST-MODIFIED:20200820T165157Z UID:1965-1598458500-1598462100@colleges.claremont.edu SUMMARY:Welcome Back Party DESCRIPTION:David Bachman\, chair of the CCMS Executive Committee\, hosts. \nPlease join us as we welcome our new community members\, socialize\, and discuss how we’re all going to cope with the semester ahead. Grab a snack\, a refreshing beverage\, and get on-line! URL:https://colleges.claremont.edu/ccms/event/colloquium-kick-off-party/ LOCATION:Zoom CATEGORIES:Colloquium ORGANIZER;CN="Helen Wong":MAILTO:hwong@cmc.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20200506T161500 DTEND;TZID=America/Los_Angeles:20200506T171500 DTSTAMP:20260406T005820 CREATED:20190830T195416Z LAST-MODIFIED:20200108T212845Z UID:1461-1588781700-1588785300@colleges.claremont.edu SUMMARY:Shahriar Shahriari DESCRIPTION: URL:https://colleges.claremont.edu/ccms/event/tba-25/ LOCATION:Freeberg Forum\, LC 62\, Kravis Center\, CMC CATEGORIES:Colloquium ORGANIZER;CN="Blerta Shtylla":MAILTO:shtyllab@pomona.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20200429T161500 DTEND;TZID=America/Los_Angeles:20200429T171500 DTSTAMP:20260406T005820 CREATED:20190830T195308Z LAST-MODIFIED:20200129T015520Z UID:1459-1588176900-1588180500@colleges.claremont.edu SUMMARY:Kiran S. Kedlaya DESCRIPTION: URL:https://colleges.claremont.edu/ccms/event/tba-24/ LOCATION:Argue Auditorium\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States CATEGORIES:Colloquium ORGANIZER;CN="Blerta Shtylla":MAILTO:shtyllab@pomona.edu GEO:34.0999157;-117.7142668 X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Argue Auditorium Pomona College 610 N. College Ave. Claremont CA 91711 United States;X-APPLE-RADIUS=500;X-TITLE=610 N. College Ave.:geo:-117.7142668,34.0999157 END:VEVENT END:VCALENDAR