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:20240310T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20241103T090000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20250309T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20251102T090000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20260308T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20261101T090000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250310T161500
DTEND;TZID=America/Los_Angeles:20250310T171500
DTSTAMP:20260403T163348
CREATED:20250130T002924Z
LAST-MODIFIED:20250303T200907Z
UID:3668-1741623300-1741626900@colleges.claremont.edu
SUMMARY:Applied Math Seminar: Sarah Robinson  (Claremont McKenna College)
DESCRIPTION:Title: Do Taxes Affect Pre-Tax Income Inequality? Evidence from 100 Years of U.S. States \nAbstract: We study how U.S. state taxes have affected pre-tax income inequality during the last century. Our primary analysis focuses on the top marginal personal income and corporate income tax\, and their effect on top incomes and top income shares within each state. The long panel nature of our data\, from 1917 to 2018\, allows us to study the effect of tax adoptions\, tax cancellations\, and tax changes\, and furthermore to assess both immediate and long-term relationships. With event study and synthetic control designs\, we generally find no statistically significant relationship between tax measures and inequality. Some of our point estimates\, as well as a simple two-way fixed effects analysis\, suggest that higher income taxes may reduce top incomes and income shares.
URL:https://colleges.claremont.edu/ccms/event/applied-math-seminar-sarah-robinson-claremont-mckenna-college/
LOCATION:Emmy Noether Room\, Estella 1021\, Pomona College\,\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Applied Math Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250311T150000
DTEND;TZID=America/Los_Angeles:20250311T160000
DTSTAMP:20260403T163348
CREATED:20250214T211215Z
LAST-MODIFIED:20250303T222536Z
UID:3703-1741705200-1741708800@colleges.claremont.edu
SUMMARY:Claremont Topology Seminar: Iris Yoon (Wesleyan University)
DESCRIPTION:We especially welcome all undergraduates and graduate students to attend topology seminar! \nSpeaker: Iris Yoon (Wesleyan University) \nTitle: Dowker duality\, profunctors\, and spectral sequences \nAbstract: I will present three short\, new proofs of Dowker duality using various poset fiber lemmas. I will introduce modifications of joins and products of simplicial complexes called relational join and relational product complexes. These relational complexes can be constructed whenever there is a relation between simplicial complexes\, which includes the context of Dowker duality and covers of simplicial complexes. In this more general setting\, I will show that the homologies of the simplicial complexes and the relational complexes fit together in a long exact sequence. If time permits\, I’ll discuss similar results for profunctors\, which are generalizations of relations to categories.
URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-iris-yoon-wesleyan-university/
LOCATION:Estella 2099\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, United States
CATEGORIES:Topology Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250312T161500
DTEND;TZID=America/Los_Angeles:20250312T173000
DTSTAMP:20260403T163348
CREATED:20250125T043428Z
LAST-MODIFIED:20250303T183823Z
UID:3646-1741796100-1741800600@colleges.claremont.edu
SUMMARY:CCMS Colloquium: (Iris Yoon\, Wesleyan University)
DESCRIPTION:Speaker: Iris Yoon\, Professor of Mathematics\, Wesleyan University \nTitle: How Topology Reveals Structure in Neuroscience Data \nAbstract: We live in an exciting time where new data is generated at an exponential rate. Such data explosion necessitates the development of novel methods for studying large\, noisy\, and complex data. One interesting aspect of data is its shape and structure. In this talk\, I will discuss recent developments in applied topology that studies the structure of data. In particular\, I will show how constructions in topology\, such as homology and Dowker complexes\, reveal interesting structures in data. I will discuss the mathematical challenges of extending these constructions to data science\, specifically in neuroscience. \nBio: Iris Yoon is an assistant professor of mathematics at Wesleyan University. She develops novel applications of algebraic topology to data science. \n 
URL:https://colleges.claremont.edu/ccms/event/ccms-colloquium-iris-yoon-wesleyan-university/
LOCATION:Argue Auditorium\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.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
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250318T080000
DTEND;TZID=America/Los_Angeles:20250318T170000
DTSTAMP:20260403T163348
CREATED:20250214T211316Z
LAST-MODIFIED:20250214T211316Z
UID:3704-1742284800-1742317200@colleges.claremont.edu
SUMMARY:Claremont Topology Seminar: NO SEMINAR
DESCRIPTION:No seminar this week due to Spring break!
URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-no-seminar/
LOCATION:CA
CATEGORIES:Topology Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250319
DTEND;VALUE=DATE:20250320
DTSTAMP:20260403T163348
CREATED:20250131T234805Z
LAST-MODIFIED:20250131T234805Z
UID:3675-1742342400-1742428799@colleges.claremont.edu
SUMMARY:No Colloquium: Spring Break
DESCRIPTION:
URL:https://colleges.claremont.edu/ccms/event/no-colloquium-spring-break/
LOCATION:CA
CATEGORIES:Colloquium
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250324T161500
DTEND;TZID=America/Los_Angeles:20250324T171500
DTSTAMP:20260403T163348
CREATED:20250130T190206Z
LAST-MODIFIED:20250311T055012Z
UID:3672-1742832900-1742836500@colleges.claremont.edu
SUMMARY:Applied Math Seminar: Ryan O'Dowd (Claremont Graduate University)
DESCRIPTION:Title: Learning on manifolds without manifold learning \nAbstract: Function approximation based on data drawn randomly from an unknown distribution is an important problem in machine learning. The manifold hypothesis assumes that the data is sampled from an unknown submanifold of a high dimensional Euclidean space. A great deal of research deals with obtaining information about this manifold\, such as the eigendecomposition of the Laplace-Beltrami operator or coordinate charts\, and using this information for function approximation. This two-step approach implies some extra errors in the approximation stemming from estimating the basic quantities of the data manifold in addition to the errors inherent in function approximation. In this paper\, we project the unknown manifold as a submanifold of an ambient hypersphere and study the question of constructing a one-shot approximation using a specially designed sequence of localized spherical polynomial kernels on the hypersphere. Our approach does not require preprocessing of the data to obtain information about the manifold other than its dimension. We give optimal rates of approximation for relatively “rough” functions.
URL:https://colleges.claremont.edu/ccms/event/applied-math-seminar-ryan-odowd-claremont-graduate-university/
LOCATION:Emmy Noether Room\, Estella 1021\, Pomona College\,\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Applied Math Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250325T121500
DTEND;TZID=America/Los_Angeles:20250325T131000
DTSTAMP:20260403T163348
CREATED:20250127T201036Z
LAST-MODIFIED:20250324T151237Z
UID:3659-1742904900-1742908200@colleges.claremont.edu
SUMMARY:Some Diophantine analogies between Dirichlet series and polynomials (Vesselin Dimitrov\, Caltech)
DESCRIPTION:I will present an integral — requiring no character twists — converse theorem for recognizing when is a Dirichlet series with algebraic integer coefficients equal to the L-function of a modular form. This refines the unbounded denominators conjecture of Atkin and Swinnerton-Dyer. Analogies with basic function field arithmetic then suggest a quantitative refinement which precludes a pair of GL(2) automorphic L-functions with closely matched up zeros. I will explain how to get at such a theorem. 
URL:https://colleges.claremont.edu/ccms/event/antc-talk-vesselin-dimitrov-caltech/
LOCATION:Estella 2113
CATEGORIES:Algebra / Number Theory / Combinatorics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250325T150000
DTEND;TZID=America/Los_Angeles:20250325T160000
DTSTAMP:20260403T163348
CREATED:20250214T211453Z
LAST-MODIFIED:20250324T000533Z
UID:3705-1742914800-1742918400@colleges.claremont.edu
SUMMARY:Claremont Topology Seminar: Reginald Anderson (Claremont McKenna College)
DESCRIPTION:We especially welcome all undergraduates and graduate students to attend topology seminar! \nSpeaker: Reginald Anderson (Claremont McKenna College) \nTitle: Kontsevich’s Recursive Formula for Rational Plane Curves \nAbstract: Gromov-Witten theory was developed in the 1990s as a curve-counting theory by integrating cohomology classes against a virtual fundamental class for a moduli space of stable maps. One early success of the theory was Kontsevich’s recursive formula for enumerating the number of rational plane curves through 3d-1 points in general position. Starting from a consideration of which genus 0 Gromov-Witten invariants for the complex projective plane can possibly be non-zero\, we will assemble a generating function for these invariants\, called the genus 0 Gromov-Witten potential for the complex projective plane. If time allows\, we will also use the fact that the potential satisfies a partial differential equation called the Witten-Dijkgraaf-Verlinde-Verlinde equation to solve for N_d\, the coefficients of the generating function\, which give the number of rational plane curves through 3d-1 points. \nThis talk follows p. 24-26 of these notes\, available at https://arxiv.org/abs/2501.03232. \nAll are welcome.
URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-reginald-anderson-claremont-mckenna-college/
LOCATION:Estella 2099\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, United States
CATEGORIES:Topology Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250326T161500
DTEND;TZID=America/Los_Angeles:20250326T173000
DTSTAMP:20260403T163348
CREATED:20250201T220938Z
LAST-MODIFIED:20250326T201510Z
UID:3681-1743005700-1743010200@colleges.claremont.edu
SUMMARY:CCMS Colloquium: Brownian Motion\, Random Fractals\, and Beyond (Yimin Xiao\, Michigan State Uni)
DESCRIPTION:Speaker: Yimin Xiao\, Professor of Statistics and Probability\, Michigan State University \nTitle: Brownian Motion\, Random Fractals\, and Beyond \nAbstract: Brownian motion is not only a fascinating object in mathematics but also a powerful stochastic model that has been applied in many scientific fields\, from physics to finance\, to biological sciences. The sample function of Brownian motion is nowhere differentiable and generates various interesting fractal sets and measures. It is natural to apply tools from Fractal Geometry (e.g. Hausdorf dimension\, packing dimension) to study the fine properties of Brownian motion. There is an enormous literature on sample path properties of Brownian motion\, including many fractal and multifractal properties.\nIn this talk\, we first provide an overview of some regularity and fractal properties of Brownian motion and its local times. These results are fundamental for the development of related theories for other stochastic processes. We then describe extensions of these results to Levy stable processes and fractional Brownian motion\, which are two important relatives of Brownian motion in the areas of Markov processes and Gaussian processes\, respectively. \nBio: Yimin Xiao is an MSU Research Foundation Professor in Statistics and Probability at Michigan State University. He received his Ph.D. from the Ohio State University in 1996. After completing his postdocs at the University of Utah and Microsoft Research\, he joined Michigan State University in 2000. His research interests include random fields\, Gaussian and Lévy processes\, stochastic partial differential equations\, extreme value theory\, random fractals\, and statistical analysis of spatial and spatio-temporal models. He has published about 160 articles in peer-reviewed journals. \nDr. Xiao has been a visiting professor at several universities in China\, France\, Germany\, Hong Kong\, Sweden\, and Switzerland and has been invited as a speaker at various international conferences. He is a Fellow of the Institute of Mathematical Statistics. \n 
URL:https://colleges.claremont.edu/ccms/event/ccms-colloquium-brownian-motion-random-fractals-and-beyond-yimin-xiao-michigan-state-uni/
LOCATION:Argue Auditorium\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.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
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250401T121500
DTEND;TZID=America/Los_Angeles:20250401T131000
DTSTAMP:20260403T163348
CREATED:20250206T191602Z
LAST-MODIFIED:20250326T164610Z
UID:3688-1743509700-1743513000@colleges.claremont.edu
SUMMARY:Permutation pattern avoidance\, alternating sign matrices\, and asymptotics (Justin Troyka\, Cal State LA)
DESCRIPTION:A big area in combinatorics over the last several decades has been the study of pattern-avoiding permutations\, whose enumeration is exciting and mysterious. Alternating sign matrices (ASMs) are a generalization of permutations whose study in combinatorics has also been exciting and mysterious. In this talk\, I will explain some new asymptotic results involving the number of ASMs that avoid a given permutation pattern\, from my joint work with Mathilde Bouvel\, Eric Egge\, Rebecca Smith\, and Jessica Striker. I will also show some of the highlights in the histories of both pattern-avoiding permutations and ASMs.
URL:https://colleges.claremont.edu/ccms/event/antc-talk-justin-troyka-cal-state-la/
LOCATION:Estella 2113
CATEGORIES:Algebra / Number Theory / Combinatorics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250401T150000
DTEND;TZID=America/Los_Angeles:20250401T160000
DTSTAMP:20260403T163348
CREATED:20250214T211604Z
LAST-MODIFIED:20250224T221209Z
UID:3706-1743519600-1743523200@colleges.claremont.edu
SUMMARY:Claremont Topology Seminar: Scott Taylor (Colby College)
DESCRIPTION:We especially welcome all undergraduates and graduate students to attend topology seminar! \nSpeaker: Scott Taylor (Colby College) \nTitle: Genus 1 Bridge Number of Satellite Knots in Lens Spaces \nAbstract: In the mid-1950s\, Horst Schubert introduced two ideas which turned out to have lasting impact in knot theory: satellite knots and bridge number. A Satellite knot is a knot which is tied in the shape of another knot (its companion). Wrapping number is one way of measuring how complicated the satellite knot is with respect to its companion. Bridge number is an invariant for knots and links in the 3-sphere. Schubert showed that the bridge number of a satellite knot is at least the wrapping number times the bridge number of the companion. I’ll give an overview of recent joint work with Maggy Tomova where we extend Schubert’s result to knots in lens spaces.
URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-scott-taylor-colby-college/
LOCATION:Estella 2099\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, United States
CATEGORIES:Topology Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250402T161500
DTEND;TZID=America/Los_Angeles:20250402T173000
DTSTAMP:20260403T163348
CREATED:20250125T044958Z
LAST-MODIFIED:20250328T163248Z
UID:3649-1743610500-1743615000@colleges.claremont.edu
SUMMARY:CCMS Colloquium: (Scott Taylor\, Colby College\, Maine)
DESCRIPTION:Speaker:  Scott Taylor\, Professor of Mathematics\, Colby College\, Maine \nTitle:  Sums and Symmetries \nAbstract: Adding is one of the fundamental mathematical operations and we like it so much\, we can’t help but add all kinds of things including knots\, surfaces\, and 3-dimensional spaces. Symmetry is also a fundamental mathematical concern. How well do sums and symmetries play together? In this talk\, I’ll survey some of the ways in which\, in low-dimensions\, sums and symmetries are frenemies: sometimes it all works beautifully and other times\, well\, it’s complicated. \nBio: Scott is a geometric topologist who studies knots and 3-dimensional spaces. He is the producer of Sum Camp\, a summer day camp for public elementary school children that uses the arts and math games to help instill a basic sense of numeracy. He is also the author of the forthcoming textbook “Introduction to Mathematics: Number\, Space\, and Structure” from the American Mathematical Society.
URL:https://colleges.claremont.edu/ccms/event/ccms-colloquium-scott-taylor-colby-college-maine/
LOCATION:Argue Auditorium\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.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
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250405T100000
DTEND;TZID=America/Los_Angeles:20250405T120000
DTSTAMP:20260403T163348
CREATED:20250304T085447Z
LAST-MODIFIED:20250316T034122Z
UID:3729-1743847200-1743854400@colleges.claremont.edu
SUMMARY:GEMS April 5th Session
DESCRIPTION:This GEMS session will be facilitated by Professor Bahar Acu from Pitzer College.\n\n\nTitle: The Hole Truth: When is a Coffee Mug a Donut?\n\nAbstract:  In mathematics\, topology is the study of properties of shapes that remain unchanged when shapes are bent\, stretched\, or deformed—so long as they aren’t torn or punctured. To a mathematician studying topology\, a donut and a coffee cup (with a handle) are considered the “same” shape because one can be continuously deformed into the other without cutting or gluing.\n\n\nIn this interactive session\, we will explore the concept of shape equivalence by counting holes—an essential feature in topology. Using Play-Doh and Wikki Stix\, we will model different shapes\, test their flexibility\, and determine whether they can be transformed into one another. Join us for a hands-on journey into the fascinating world of topology\, where a simple twist in perspective can redefine how we see the shapes around us!
URL:https://colleges.claremont.edu/ccms/event/gems-april-5th-session/
LOCATION:Shanahan 1480\, Harvey Mudd College\, 301 Platt Blvd.\, Claremont\, CA\, 91711\, United States
CATEGORIES:GEMS
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250407T161500
DTEND;TZID=America/Los_Angeles:20250407T171500
DTSTAMP:20260403T163348
CREATED:20250402T004832Z
LAST-MODIFIED:20250402T004832Z
UID:3749-1744042500-1744046100@colleges.claremont.edu
SUMMARY:Applied Math Seminar: Ethan Epperly (Caltech)
DESCRIPTION:Title: Randomly pivoted Cholesky: Fast\, accurate matrix approximation for scientific machine learning \nAbstract:\nLow-rank approximation of positive semidefinite matrices is a basic problem in computational mathematics\, with many applications to machine learning and scientific computing. Existing approaches for this problem largely fall into two categories: simple\, fast\, but sometimes inaccurate methods and sophisticated\, slower methods with accuracy guarantees. To achieve the best of both worlds\, this talk introduces randomly pivoted Cholesky\, an algorithm for positive semidefinite low-rank approximation that is simple\, fast\, and accurate. We demonstrate the effectiveness of randomly pivoted Cholesky for spectral clustering of molecular dynamics data\, achieving an order of magnitude lower clustering error than previous methods. We then go on to discuss theoretical guarantees for randomly pivoted Cholesky. Using a matrix concavity argument\, we show that randomly pivoted Cholesky has nearly optimal low-rank approximation properties. We conclude by discussing extensions and future prospects for this simple\, yet effective\, algorithm.
URL:https://colleges.claremont.edu/ccms/event/applied-math-seminar-ethan-epperly-caltech/
LOCATION:Emmy Noether Room\, Estella 1021\, Pomona College\,\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Applied Math Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250408T121500
DTEND;TZID=America/Los_Angeles:20250408T131000
DTSTAMP:20260403T163348
CREATED:20250212T050525Z
LAST-MODIFIED:20250407T150550Z
UID:3692-1744114500-1744117800@colleges.claremont.edu
SUMMARY:The ANTC of ChatGPT: On the Mathematical Foundations of Large Language Models (Gizem Karaali\, Pomona)
DESCRIPTION:Large Language Models like ChatGPT rely on surprisingly familiar mathematics. This talk will explore how ideas from (linear) algebra\, number theory and combinatorics  appear — both directly and indirectly — in the structure and behavior of these models. Along the way\, we’ll touch on themes like structure\, symmetry\, and scale\, and consider how abstract mathematical ideas can shed light on systems that process and generate human language. The talk will be self-contained\, and no background in machine learning will be assumed. (This abstract was prepared with the assistance of ChatGPT\, which seems to be remarkably self-aware of its own mathematical foundations.)
URL:https://colleges.claremont.edu/ccms/event/antc-talk-gizem-karaali-pomona-3/
LOCATION:Estella 2113
CATEGORIES:Algebra / Number Theory / Combinatorics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250409T161500
DTEND;TZID=America/Los_Angeles:20250409T173000
DTSTAMP:20260403T163348
CREATED:20250131T234941Z
LAST-MODIFIED:20250409T232205Z
UID:3676-1744215300-1744219800@colleges.claremont.edu
SUMMARY:CCMS Colloquium presents "Fall 2025 Course Preview Session"
DESCRIPTION:Fall 2025 Course Preview Session \nModerator: Lenny Fukshansky\, Professor of Mathematics\, Claremont McKenna College\, CA \nSlide Link: https://docs.google.com/presentation/d/142NF1vUazpGNLF0pfLKc0qhkv4VoMQstSvZ0yKtMfNE/edit?usp=sharing
URL:https://colleges.claremont.edu/ccms/event/ccms-colloquium-presents-fall-2025-course-preview-session/
LOCATION:CA
CATEGORIES:Colloquium
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250414T161500
DTEND;TZID=America/Los_Angeles:20250414T171500
DTSTAMP:20260403T163348
CREATED:20250130T003204Z
LAST-MODIFIED:20250401T164506Z
UID:3670-1744647300-1744650900@colleges.claremont.edu
SUMMARY:Applied Math Seminar: Victoria Chebotaeva (USC)
DESCRIPTION:Title: Erlang-Distributed SEIR Epidemical Models \nAbstract: \nWe examine the effects of different dynamics in epidemiological models\, focusing on two key approaches. The first model incorporates reaction-diffusion dynamics\, where susceptible individuals avoid areas with high concentrations of infected individuals. The second model divides exposed and infectious individuals into symptomatic and asymptomatic subclasses.\nOur findings emphasize the importance of adaptive control measures\, such as targeted testing\, contact tracing\, and isolation\, in effectively containing disease spread while minimizing societal and economic impacts. The models highlight the distinct roles of symptomatic and asymptomatic individuals\, demonstrating how tailored public health strategies can improve resource management and mitigate the socio-economic effects of outbreaks.
URL:https://colleges.claremont.edu/ccms/event/applied-math-seminar-course-preview-2/
LOCATION:Emmy Noether Room\, Estella 1021\, Pomona College\,\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Applied Math Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250415T121500
DTEND;TZID=America/Los_Angeles:20250415T131000
DTSTAMP:20260403T163348
CREATED:20250226T050009Z
LAST-MODIFIED:20250413T154206Z
UID:3715-1744719300-1744722600@colleges.claremont.edu
SUMMARY:Jacobians of tropical curves and finite graphs (Carrie Frizzell\, Scripps)
DESCRIPTION:A Jacobian variety is a principally polarized abelian variety (PPAV) associated with a smooth complex algebraic curve. For dimensions less than or equal to 3\, every PPAV is either a Jacobian or a product of Jacobians. The Schottky problem concerns dimensions 4 and greater: which PPAVs are Jacobians? The Schottky problem can also be posed in the tropical setting\, in which the Jacobian of a tropical curve is a real torus. We will spend most of the talk discussing tropical Jacobians and their discrete counterparts\, but we will also survey a few results related to the aforementioned Schottky problem.
URL:https://colleges.claremont.edu/ccms/event/antc-talk-carrie-frizzell-scripps/
LOCATION:Estella 2113
CATEGORIES:Algebra / Number Theory / Combinatorics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250415T150000
DTEND;TZID=America/Los_Angeles:20250415T160000
DTSTAMP:20260403T163348
CREATED:20250303T182159Z
LAST-MODIFIED:20250413T171750Z
UID:3719-1744729200-1744732800@colleges.claremont.edu
SUMMARY:Claremont Topology Seminar: Sierra Knavel (Georgia Tech)
DESCRIPTION:We especially welcome all undergraduates and graduate students to attend topology seminar! \nSpeaker: Sierra Knavel (Georgia Tech) \nTitle: Betti Numbers and Indecomposability of Genus-2 Lefschetz Fibrations \nAbstract: Symplectic 4-manifolds\, smooth 4-manifolds equipped with a closed\, nondegenerate 2-form\, arise naturally in classical mechanics and have become central objects of study in topology. Following foundational work by Donaldson and Gompf\, Lefschetz pencils have been shown to correspond bijectively with symplectic 4-manifolds\, making symplectic 4-manifolds a tractable family of smooth 4-manifolds to work with. This talk focuses on genus-2 Lefschetz fibrations obtained by blowing up Lefschetz pencils and presents new bounds on their first Betti number. We will also examine a particularly elusive class of non-simply connected\, indecomposable genus-2 fibrations and consider the prospects of extending these results to higher genera.
URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-sierra-knavel-georgia-tech/
LOCATION:Estella 2099\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, United States
CATEGORIES:Topology Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250416T161500
DTEND;TZID=America/Los_Angeles:20250416T173000
DTSTAMP:20260403T163348
CREATED:20250125T050219Z
LAST-MODIFIED:20250403T225051Z
UID:3650-1744820100-1744824600@colleges.claremont.edu
SUMMARY:CCMS Colloquium: (Naneh Apkarian\, Arizona State University\, Arizona)
DESCRIPTION:Speaker:  Naneh Apkarian Professor of Mathematics\, Arizona State University\, Arizona \nTitle: Student Success in an Interactive STEM Ecosystem \nAbstract: This talk begins with a discussion of the multifaceted nature of “student success” in STEM\, including externally recognized markers (e.g.\, grades) and internally defined indicators (e.g.\, enjoyment). Investigations of the factors which contribute to student success along various dimensions\, how to improve student success\, and how to implement successful interventions at scale reveal the complexities of the STEM higher education ecosystem as well as the critical role of introductory mathematics courses. I will review results along these themes\, highlighting interactions which define that ecosystem and support/constrain different aspects of student success\, for different populations. This includes the role of intra- and extra-curricular factors such as student-student interactions\, course coordination\, departmental culture\, and instructors’ beliefs. Implications for research and practice will also be discussed. \nBio: Dr. Naneh Apkarian is an Assistant Professor in the School of Mathematical and Statistical Sciences at Arizona State University. She is from California\, where she obtained a BA and MA in mathematics prior to completing her PhD in mathematics education. Pursuing departmental change as a strategy for transforming mathematics education\, she was for two years a postdoctoral researcher at Western Michigan University. Her research spans many facets of the STEM education ecosystem\, including the knowledge\, beliefs\, practices\, and experiences of students and instructors\, departmental culture\, and interactions within and across levels – always in the service of building inclusive excellence. Outside academia\, Dr. Apkarian continues to play competitive water polo across the US and the world. \n 
URL:https://colleges.claremont.edu/ccms/event/ccms-colloquium-naneh-apkarian-arizona-state-university-arizona/
LOCATION:Argue Auditorium\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.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
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250421T161500
DTEND;TZID=America/Los_Angeles:20250421T171500
DTSTAMP:20260403T163348
CREATED:20250130T003350Z
LAST-MODIFIED:20250320T010652Z
UID:3671-1745252100-1745255700@colleges.claremont.edu
SUMMARY:Applied Math Seminar: Fabio Milner (Arizona State University)
DESCRIPTION:Title: Modeling viral STI epidemics \nAbstract: We will describe an SIR model of viral sexually transmitted infections in a population structured by sex and sexual preference and its validation in the simple SI case from HIV data incidence. We will also use the model to establish a plausible structure of the U.S. population by sexual preferences for men and women and perform a case scenario analysis of the impact that changes in sexual preferences may have in the incidence of STIs.
URL:https://colleges.claremont.edu/ccms/event/applied-math-seminar-fabio-milner-arizona-state-university/
LOCATION:Emmy Noether Room\, Estella 1021\, Pomona College\,\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Applied Math Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250422T121500
DTEND;TZID=America/Los_Angeles:20250422T131000
DTSTAMP:20260403T163348
CREATED:20250304T000158Z
LAST-MODIFIED:20250421T175544Z
UID:3727-1745324100-1745327400@colleges.claremont.edu
SUMMARY:Algebraic properties of linguistic structure (Isabella Senturia\, Yale / Caltech)
DESCRIPTION:The recognition that theoretical models of natural language syntax have robust algebraic foundations is longstanding. Both the syntactic structures proposed (trees\, semirings\, etc.) and metrics developed to understand them (the Chomsky hierarchy\, partial orders\, and so forth) closely resemble structures and systems familiar to theoretical mathematicians (groups\, rings\, fields\, …). Despite the underlying mathematical tools\, rarely do structural properties of language get analyzed at an algebraic level. I use two complementary perspectives\, one representational and continuous (spectral graph theory) and one derivational and discrete (Hopf algebras)\, as lenses to explore mathematical properties of linguistic structure. I will also show a connection between the two approaches through a case study on the problem of learning syntactic parameters.
URL:https://colleges.claremont.edu/ccms/event/antc-talk-isabella-senturia-yale-caltech/
LOCATION:Estella 2113
CATEGORIES:Algebra / Number Theory / Combinatorics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250422T150000
DTEND;TZID=America/Los_Angeles:20250422T160000
DTSTAMP:20260403T163348
CREATED:20250303T212722Z
LAST-MODIFIED:20250303T212722Z
UID:3724-1745334000-1745337600@colleges.claremont.edu
SUMMARY:Claremont Topology Seminar: Sam Nelson (Claremont McKenna College)
DESCRIPTION:We especially welcome all undergraduates and graduate students to attend topology seminar! \nSpeaker: Sam Nelson (Claremont McKenna College) \nTitle: Virtual Biquandle Cocycle Quiver Representations \nAbstract: We construct a quiver representation valued invariant of virtual knots and links using virtual biquandle homology.
URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-sam-nelson-claremont-mckenna-college/
LOCATION:Estella 2099\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, United States
CATEGORIES:Topology Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250423T161500
DTEND;TZID=America/Los_Angeles:20250423T173000
DTSTAMP:20260403T163348
CREATED:20250131T235210Z
LAST-MODIFIED:20250417T222240Z
UID:3677-1745424900-1745429400@colleges.claremont.edu
SUMMARY:CCMS Colloquium: Agent-Based and Continuous Models of Locust Hopper Bands (Andrew J. Bernoff\, Harvey Mudd College\, CA)
DESCRIPTION:Speaker: Andrew J. Bernoff\, Professor of Mathematics\, Harvey Mudd College \nAbstract: An outstanding challenge in mathematical biology is using laboratory and/or field observations to tune a model’s functional form and parameter values. These problems lie at the intersection of dynamical systems and data science. In this talk I will discuss an ongoing project developing models of the Australian plague locust for which excellent field data is available. Under favorable environmental conditions flightless juveniles aggregate into coherent\, aligned swarms referred to as hopper bands. We develop two models of hopper bands in tandem; an agent-based model that tracks the position of individuals and a continuum model describing locust density. By examining 4.4 million parameter combinations\, we identify a set of parameters that reproduce field observations. \nI will then discuss ongoing efforts to improve these models. The first extends this work by modeling locust alignment via the Kuramoto model of oscillator synchronization. The second uses motion tracking of tens of thousands of locusts to shed light on how locust movement is influenced by social interactions. \n  \nBio: Andrew Bernoff is a Professor of Mathematics whose research focuses on applying dynamical systems to physical and biological phenomena\, with notable international recognition for his work on swarming. He earned degrees in math and physics from MIT and a  PhD from the University of Cambridge as a Marshall Scholar. With over 50 published papers and multiple NSF and Simons Foundation grants\, his interdisciplinary collaborations span physics\, engineering\, chemistry\, and biology. \nA dedicated educator\, Bernoff has mentored over 60 undergraduate research projects at Harvey Mudd College\, with many students pursuing PhDs at top institutions. He has served in leadership roles including Director of the Claremont Center for Mathematical Sciences\, Chair of the SIAM Dynamical Systems Group\, and a co-author of the Putnam Exam (2019–2021).
URL:https://colleges.claremont.edu/ccms/event/ccms-colloquium-shivkumar-chandrasekaran-uc-santa-barbara/
LOCATION:Argue Auditorium\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.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
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250425T131500
DTEND;TZID=America/Los_Angeles:20250425T141500
DTSTAMP:20260403T163348
CREATED:20250423T051049Z
LAST-MODIFIED:20250423T051555Z
UID:3768-1745586900-1745590500@colleges.claremont.edu
SUMMARY:Data Science / Statistics Seminar: Ana Maria Kenney (UC Irvine)
DESCRIPTION:Speaker: Ana Maria Kenney\, Assistant Professor\, Department of Statistics\, UC Irvine \nTitle: Distilling heterogeneous treatment effects: Stable subgroup estimation in causal inference \nAbstract: Recent methodological developments have introduced new black-box approaches to better estimate heterogeneous treatment effects; however\, these methods fall short of providing interpretable characterizations of the underlying individuals who may be most at risk or benefit most from receiving the treatment\, thereby limiting their practical utility. In this work\, we introduce a novel method\, causal distillation trees (CDT)\, to estimate interpretable subgroups. CDT allows researchers to fit any machine learning model of their choice to estimate the individual-level treatment effect\, and then leverages a simple\, second-stage tree-based model to “distill” the estimated treatment effect into meaningful subgroups. As a result\, CDT inherits the improvements in predictive performance from black-box machine learning models while preserving the interpretability of a simple decision tree. We derive theoretical guarantees for the consistency of the estimated subgroups using CDT\, and introduce stability-driven diagnostics for researchers to evaluate the quality of the estimated subgroups. We illustrate our proposed method on a randomized controlled trial of antiretroviral treatment for HIV from the AIDS Clinical Trials Group Study 175 and show that CDT out-performs state-of-the-art approaches in constructing stable\, clinically relevant subgroups. \nBio: Ana Maria Kenney is an Assistant Professor in the Department of Statistics at UC Irvine. She works at the interface of statistics\, interpretable machine learning\, and large-scale optimization to advance biomedical research. She has been on several interdisciplinary teams across institutions spanning cardiovascular genetics\, “Omics” contributions to early infant growth\, and early cancer screening. She completed a postdoc at UC Berkeley and previously received a dual title Ph.D. at Penn State in Statistics and Operations Research. There she was a Biomedical Big Data to Knowledge Training Fellow and Alfred P. Sloan Ph.D. Scholar.
URL:https://colleges.claremont.edu/ccms/event/data-science-statistics-seminar-ana-maria-kenney-uc-irvine/
LOCATION:Roberts North 15\, CMC\, 320 E. 9th St.\, Claremont\, 91711\, United States
CATEGORIES:Special Event
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250428T161500
DTEND;TZID=America/Los_Angeles:20250428T171500
DTSTAMP:20260403T163348
CREATED:20250426T011634Z
LAST-MODIFIED:20250426T011735Z
UID:3772-1745856900-1745860500@colleges.claremont.edu
SUMMARY:Applied Math Seminar: Alejandra Castillo (Pomona College)
DESCRIPTION:Title:    Randomized Kaczmarz Methods for Corrupted Tensor Linear Systems \nAbstract: Recovering tensor-valued signals from corrupted measurements is a central problem in various applications such as hyperspectral image reconstruction and medical imaging. This talk considers tensor linear systems of the form AX = B\, that contain observations potentially affected by sparse\, large-magnitude corruptions.  A quantile-based randomized Kaczmarz algorithm\, called quantile tensor randomized Kaczmarz (QTRK)\, is discussed to address this challenge. By integrating quantile statistics into the iterative update process\, QTRK improves robustness against adversarial errors. A variant selectively omits unreliable measurements to enhance stability further.
URL:https://colleges.claremont.edu/ccms/event/applied-math-seminar-alejandra-castillo-pomona-college/
LOCATION:Emmy Noether Room\, Estella 1021\, Pomona College\,\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Applied Math Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250429T150000
DTEND;TZID=America/Los_Angeles:20250429T160000
DTSTAMP:20260403T163348
CREATED:20250303T212829Z
LAST-MODIFIED:20250428T212953Z
UID:3725-1745938800-1745942400@colleges.claremont.edu
SUMMARY:Claremont Topology Seminar: David Bachman (Pitzer College)
DESCRIPTION:We especially welcome all undergraduates and graduate students to attend topology seminar! \nSpeaker: David Bachman (Pitzer College) \nTitle: Learning optimal knot projections \nAbstract: We use techniques from Reinforcement Learning to find knot projections which minimize crossing number.
URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-david-bachman-pitzer-college/
LOCATION:Estella 2099\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, United States
CATEGORIES:Topology Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250430T161500
DTEND;TZID=America/Los_Angeles:20250430T173000
DTSTAMP:20260403T163348
CREATED:20250131T235446Z
LAST-MODIFIED:20250428T233421Z
UID:3679-1746029700-1746034200@colleges.claremont.edu
SUMMARY:CCMS Colloquium presents the Second Barbara Beechler Talk: Deanna Needell (UCLA)
DESCRIPTION:CCMS Colloquium invites you to the Second Barbara Beechler Lecture by Professor Deanna Needell\, Professor of Mathematics\, Dunn Family Endowed Chair in Data Theory\nExecutive Director\, Institute for Digital Research and Education (IDRE) at UCLA. \nTitle: Fairness and Foundations in Machine Learning \nAbstract: In this talk\, we will address areas of recent work centered around the themes of fairness and foundations in machine learning as well as highlight the challenges in this area. We will discuss recent results involving linear algebraic tools for learning\, such as methods in non-negative matrix factorization that include tailored approaches for fairness. We will showcase our approach as well as practical applications of those methods.  Then\, we will discuss new foundational results that theoretically justify phenomena like benign overfitting in neural networks.  Throughout the talk\, we will include example applications from collaborations with community partners\, using machine learning to help organizations with fairness and justice goals. This talk includes work joint with Erin George\, Kedar Karhadkar\, Lara Kassab\, and Guido Montufar. \nSpeaker Bio: Deanna Needell earned her PhD from UC Davis before working as a postdoctoral fellow at Stanford University. She is currently a full professor of mathematics at UCLA\, the Dunn Family Endowed Chair in Data Theory\, and the Executive Director for UCLA’s Institute for Digital Research and Education. She has earned many awards including the Alfred P. Sloan fellowship\, an NSF CAREER and other awards\, the IMA prize in Applied Mathematics\, is a 2022 American Mathematical Society (AMS) Fellow and a 2024 Society for industrial and applied mathematics (SIAM) Fellow. She has been a research professor fellow at several top research institutes including the SLMath (formerly MSRI) and Simons Institute in Berkeley. She also serves as associate editor for several journals including Linear Algebra and its Applications and the SIAM Journal on Imaging Sciences\, as well as on the organizing committee for SIAM sessions and the Association for Women in Mathematics. \n 
URL:https://colleges.claremont.edu/ccms/event/ccms-colloquium-second-barbara-beechler-talk/
LOCATION:Argue Auditorium\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.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
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250505T161500
DTEND;TZID=America/Los_Angeles:20250505T171500
DTSTAMP:20260403T163348
CREATED:20250130T003036Z
LAST-MODIFIED:20250327T174327Z
UID:3669-1746461700-1746465300@colleges.claremont.edu
SUMMARY:Applied Math Seminar: Evan Rosenman (Claremont McKenna College)
DESCRIPTION:Title: TBA \nAbstract: TBA
URL:https://colleges.claremont.edu/ccms/event/applied-math-seminar-evan-rosenman-claremont-mckenna-college/
LOCATION:Emmy Noether Room\, Estella 1021\, Pomona College\,\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Applied Math Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250507T161500
DTEND;TZID=America/Los_Angeles:20250507T173000
DTSTAMP:20260403T163348
CREATED:20250131T235319Z
LAST-MODIFIED:20250313T165841Z
UID:3678-1746634500-1746639000@colleges.claremont.edu
SUMMARY:CCMS Colloquium presents "Career Panel"
DESCRIPTION:TBA
URL:https://colleges.claremont.edu/ccms/event/ccms-colloquium-presents-career-panel/
LOCATION:Argue Auditorium\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.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