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X-WR-CALDESC:Events for Claremont Center for the Mathematical Sciences
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DTSTART;TZID=America/Los_Angeles:20251101T100000
DTEND;TZID=America/Los_Angeles:20251101T115500
DTSTAMP:20260423T223938
CREATED:20251006T221917Z
LAST-MODIFIED:20251015T083012Z
UID:3886-1761991200-1761998100@colleges.claremont.edu
SUMMARY:GEMS November 1st Session
DESCRIPTION:This GEMS session will be facilitated by Grace Akinwande from the Claremont Graduate University.\n\n\nTitle: From Pizza to Calculus: Understanding Area Through Approximation\n\nAbstract: How much more pizza do you really get from a larger size? In this presentation\, we explore the concept of area starting from an everyday question—the pizza dilemma! We’ll review basic geometric areas and extend the idea to regions bounded by curves. Using simple rectangular approximations\, we’ll discover how increasing the number of rectangles improves accuracy and leads us naturally to the concept of limits. By connecting geometry\, algebra\, and reasoning\, this session illustrates how real-world problems can introduce fundamental ideas of calculus in a fun and intuitive way.
URL:https://colleges.claremont.edu/ccms/event/gems-november-1st-session/
LOCATION:Shanahan B450\, Harvey Mudd College\, 301 Platt Blvd.\, Claremont\, 91711\, United States
CATEGORIES:GEMS
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251103T161500
DTEND;TZID=America/Los_Angeles:20251103T171500
DTSTAMP:20260423T223938
CREATED:20251021T180716Z
LAST-MODIFIED:20251021T180716Z
UID:3909-1762186500-1762190100@colleges.claremont.edu
SUMMARY:Convergence analysis of the Alternating Anderson-Picard method for nonlinear fixed-point problems (Xue Feng\, UCLA)
DESCRIPTION:Abstract: Anderson Acceleration (AA) has been widely used to solve nonlinear fixed-point problems due to its rapid convergence. This talk focuses on a variant of AA in which multiple Picard iterations are performed between each AA step\, referred to as the Alternating Anderson-Picard (AAP) method. Despite introducing more `slow’ Picard iterations\, this method has been demonstrated to be efficient and even more robust in both linear and nonlinear cases. However\, there is a lack of theoretical analysis for AAP in the nonlinear context. In this work\, we address this gap by establishing the equivalence between AAP and a multisecant-GMRES method that employs GMRES to solve a multisecant linear system at each iteration. From this perspective\, we show that AAP actually “converges” the well-known Newton-GMRES method. These connections also help us understand the convergence behavior of AAP\, especially the asymptotic convergence rate.
URL:https://colleges.claremont.edu/ccms/event/convergence-analysis-of-the-alternating-anderson-picard-method-for-nonlinear-fixed-point-problems-xue-feng-ucla/
LOCATION:Emmy Noether Room\, Estella 1021\, Pomona College\,\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Applied Math Seminar
ORGANIZER;CN="Ryan Aschoff":MAILTO:ryan.aschoff@cgu.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251104T121500
DTEND;TZID=America/Los_Angeles:20251104T131000
DTSTAMP:20260423T223938
CREATED:20250818T205450Z
LAST-MODIFIED:20250824T043204Z
UID:3793-1762258500-1762261800@colleges.claremont.edu
SUMMARY:Classifying possible density degree sets of hyperelliptic curves (Jasmine Camero\, Emory University)
DESCRIPTION:Let $C$ be a nice (smooth\, projective\, geometrically integral) curve over a number field $k$. The single most important geometric invariant of a curve is the genus\, which can control various arithmetic properties of a curve. A celebrated result of Faltings implies that all points on $C$ come in families of bounded degree\, with finitely many exceptions. This result symbolized an advancement in the study of arithmetic information about curves and serves as the guiding philosophy of arithmetic geometry by highlighting the idea that “geometry governs arithmetic.” We explore the behavior of parameterized points and deduce consequences for the arithmetic of hyperelliptic curves\, specifically focusing on classifying the density degree sets of such curves.
URL:https://colleges.claremont.edu/ccms/event/classifying-possible-density-degree-sets-of-hyperelliptic-curves-jasmine-camero-emory-university/
LOCATION:Estella 2099
CATEGORIES:Algebra / Number Theory / Combinatorics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251104T160000
DTEND;TZID=America/Los_Angeles:20251104T170000
DTSTAMP:20260423T223938
CREATED:20250910T222316Z
LAST-MODIFIED:20251008T173035Z
UID:3829-1762272000-1762275600@colleges.claremont.edu
SUMMARY:Claremont Topology Seminar: Robert Cass (Claremont McKenna College)
DESCRIPTION:We welcome all undergraduate/graduate students and faculty to attend topology seminar! \nSpeaker: Robert Cass (Claremont McKenna College) \nTitle: Schubert varieties are splinters \nAbstract: Schubert varieties are among the most well-studied singular algebraic varieties\, and they have numerous applications in combinatorics and representation theory. In positive characteristic\, Schubert varieties are known to be Frobenius split by the work of Mehta and Ramanathan. More recently\, Bhatt showed that the full flag variety for GL_n is a derived splinter by entirely different methods. In this talk\, we explain these concepts\, and we show how to generalize Bhatt’s result to all Schubert varieties. Our methods apply equally well to affine Schubert varieties\, which are of interest in number theory. This is joint work with João Lourenço.
URL:https://colleges.claremont.edu/ccms/event/robert-cass-claremont-mckenna-college/
LOCATION:Fletcher 104\, Pitzer College\, 1050 N Mills Ave\, Claremont\, 91711\, United States
CATEGORIES:Topology Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251107T110000
DTEND;TZID=America/Los_Angeles:20251107T121500
DTSTAMP:20260423T223938
CREATED:20250923T141522Z
LAST-MODIFIED:20251103T173924Z
UID:3864-1762513200-1762517700@colleges.claremont.edu
SUMMARY:CCMS Colloquium: Jemma Lorenat (Pitzer)
DESCRIPTION:CCMS Colloquium invites you to a talk by Jemma Lorenat (Pitzer)\n\n \nTitle: Recognizing data: statistical literacies around 1900\n \nAbstract: This talk centers on the first (and perhaps only) doctorate in the theory of correlations\, granted by University College London in 1899 to Alice Lee. The production and reception of Lee’s research sheds light on the varieties of statistical literacies around 1900.\n \nBio: Jemma Lorenat is a historian of mathematics at Pitzer College. She spends a great deal of time thinking about the history and future of statistical literacies. She also loves conic sections and (some) other algebraic curves.
URL:https://colleges.claremont.edu/ccms/event/ccms-colloquium-jemma-lorenat-pitzer/
LOCATION:Davidson Lecture Hall\, CMC\, 340 E 9th St\, Claremont\, CA\, 91711\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251110T161500
DTEND;TZID=America/Los_Angeles:20251110T171500
DTSTAMP:20260423T223938
CREATED:20251006T190434Z
LAST-MODIFIED:20251006T223009Z
UID:3883-1762791300-1762794900@colleges.claremont.edu
SUMMARY:To Wait or Not to Wait? A Trade-off Between Population Externality and Signal Quality (Lan-Yi Liu\, National Taiwan University)
DESCRIPTION:Abstract: Transparency is vital for efficiency in social systems\, yet individuals with critical information often strategically postpone disclosure\, even when required\, to benefit themselves.\nTo study this behavior\, we introduce a multi-stage Chinese restaurant game with incomplete information that features system-recommended action rules and varying levels of player foresight. In our model\, players initially receive a suggestion to join a queueing group based on their private signal\, but can choose to switch groups. Following this\, players sequentially select a final resource\, balancing the desire to avoid congested externalities with the need to acquire more information.\nWe prove a closed-form solution for the players’ pure-strategy Nash equilibrium. Our key finding is that players with high-quality signals have no incentive to reveal their information to those with low-quality signals. This suggests that allowing players to strategically determine their decision timing\, without further system design\, leads to an inefficient equilibrium allocation.\nOur results on congested externalities and system suggestions help explain the inherent trade-off between information quality and decision timing in various real-world scenarios\, such as the challenges of vaccine distribution during a pandemic\, the strategic crowding of factory location selection\, and the decision-making faced by political candidates positioning themselves on the spectrum.
URL:https://colleges.claremont.edu/ccms/event/to-wait-or-not-to-wait-a-trade-off-between-population-externality-and-signal-quality-lan-yi-liu-harvey-mudd-college/
LOCATION:Emmy Noether Room\, Estella 1021\, Pomona College\,\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Applied Math Seminar
ORGANIZER;CN="Ryan Aschoff":MAILTO:ryan.aschoff@cgu.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251111T121500
DTEND;TZID=America/Los_Angeles:20251111T131000
DTSTAMP:20260423T223938
CREATED:20250827T221608Z
LAST-MODIFIED:20251022T171318Z
UID:3799-1762863300-1762866600@colleges.claremont.edu
SUMMARY:Elementary probability via bundles (Wai Yan Pong\, Cal State Dominguez Hills)
DESCRIPTION:This talk explores elementary probability and statistics through the language of category theory. We introduce a category of Bundles and use it to reinterpret several results typically covered in an introductory course on probability and statistics. This approach naturally reveals the underlying geometric structures common to these results. The talk is accessible to anyone familiar with linear algebra\, and we hope teachers of probability will find this perspective fresh and interesting.
URL:https://colleges.claremont.edu/ccms/event/antc-talk-wai-yan-pong-cal-state-dominguez-hills-2/
LOCATION:Estella 2099
CATEGORIES:Algebra / Number Theory / Combinatorics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251112T161500
DTEND;TZID=America/Los_Angeles:20251112T171500
DTSTAMP:20260423T223938
CREATED:20251021T163403Z
LAST-MODIFIED:20251021T163730Z
UID:3900-1762964100-1762967700@colleges.claremont.edu
SUMMARY:The 16th Atul Vyas Memorial Lecture in Mathematics (Teal Witter\, CMC)
DESCRIPTION:Atul Vyas was an outstanding CMC student who was majoring in Mathematics and Physics. He tragically lost his life in a train crash that occurred on September 12\, 2008 in Chatsworth\, California. The Mathematical Sciences Department at CMC fondly remembers Atul as someone who was equally excited by the power of mathematical abstraction and the possibilities for its applications. \nIn memory of Atul\, the CMC Mathematical Sciences Department hosts a yearly lecture series\, aimed at a general audience\, on the Creative Application of Abstract Mathematical Ideas. \nA brief reception will take place prior to the talk at 4:00 PM \nFor more details\, please see the attached Flyer \nSpeaker: R. Teal Witter\, Assistant Professor of Mathematical and Computer Science\, CMC \nTitle: Estimating Shapley Values for Explainable AI via Richer Model Approximations \nAbstract: Gradient descent is at the heart of modern machine learning: We iteratively update the weights of machine learning models to minimize a problem-specific loss. When it works well\, we deploy the model in human-facing domains like healthcare\, finance\, or the justice system. But even though we know how models are trained\, we don’t understand why they make the decisions they do. A particularly compelling approach to explaining AI predictions is the Shapley value\, a game-theoretic quantity that measures how each input to the model affects its output. Mathematically\, the i-th Shapley value is the average change in the i-th dimension of a particular function defined on the d-dimensional hypercube. Because the hypercube has 2^d points\, exactly computing Shapley values is infeasible. In this talk\, we will instead leverage algorithmic insights to develop state-of-the-art approximation methods.
URL:https://colleges.claremont.edu/ccms/event/the-16th-atul-vyas-memorial-lecture-in-mathematics/
LOCATION:Freeberg Forum\, LC 62\, Kravis Center\, CMC
CATEGORIES:Special Event
ORGANIZER;CN="Robert Cass":MAILTO:rcass@cmc.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251114T110000
DTEND;TZID=America/Los_Angeles:20251114T121500
DTSTAMP:20260423T223938
CREATED:20250923T141739Z
LAST-MODIFIED:20251112T013211Z
UID:3865-1763118000-1763122500@colleges.claremont.edu
SUMMARY:CCMS Colloquium: Robert Sanchez (HMC)
DESCRIPTION:CCMS Colloquium invites you to a talk by Robert Sanchez (HMC)\n\n \nTitle: Tides: Under the Sea and Under the Ice\n \nAbstract: Physical oceanography is the study of ocean fluid dynamics (e.g.\, waves\, currents\, plumes\, turbulence). This talk will introduce physical oceanography and the methods used to analyze ocean data such as time-series analysis and numerical solutions to differential equations. We will use these methods to investigate the tidally driven waves in a glacial fjord. Data analysis and numerical modeling of the system suggest a surprising origin for the waves with potential consequences for the melting of glaciers.\n \nBio: Robert Sanchez is a new Assistant Professor at Harvey Mudd College with a joint appointment between the Mathematics Department and the Hixon Center for the Climate and Environment. Prior to Harvey Mudd\, he was an NSF Postdoc Scholar at the University of Florida and he received his PhD in Physical Oceanography from the Scripps Institution of Oceanography. \n 
URL:https://colleges.claremont.edu/ccms/event/ccms-colloquium-robert-sanchez-hmc/
LOCATION:Davidson Lecture Hall\, CMC\, 340 E 9th St\, Claremont\, CA\, 91711\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251117T161500
DTEND;TZID=America/Los_Angeles:20251117T171500
DTSTAMP:20260423T223938
CREATED:20251111T194006Z
LAST-MODIFIED:20251111T194015Z
UID:3924-1763396100-1763399700@colleges.claremont.edu
SUMMARY:A Signal Separation View of Classification (Ryan O'Dowd\, CGU)
DESCRIPTION:Abstract: The problem of classification in machine learning has often been approached in terms of function approximation. In this talk\, we propose an alternative approach for classification in arbitrary compact metric spaces which\, in theory\, yields both the number of classes\, and a perfect classification using a minimal number of queried labels. Our approach uses localized trigonometric polynomial kernels initially developed for the point source signal separation problem in signal processing. Rather than point sources\, we examine a convex combination of probability distributions representing the various classes from the machine learning classification problem. The localized kernel technique developed for separating point sources is then shown to separate the supports of these distributions. This is done in a hierarchical manner in our MASC algorithm to accommodate touching/overlapping class boundaries. The algorithm works in an active learning paradigm\, deciding on points to query for their true class label and extending those labels to nearby points. We illustrate our theory on several simulated and real life data sets\, including the Salinas and Indian Pines hyperspectral data sets and a document data set.
URL:https://colleges.claremont.edu/ccms/event/a-signal-separation-view-of-classification-ryan-odowd-cgu/
LOCATION:Estella 1021 (Emmy Noether Room)\, Pomona College\, Claremont\, CA\, 91711\, United States
CATEGORIES:Applied Math Seminar
ORGANIZER;CN="Ryan Aschoff":MAILTO:ryan.aschoff@cgu.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251118T121500
DTEND;TZID=America/Los_Angeles:20251118T131000
DTSTAMP:20260423T223938
CREATED:20250808T232856Z
LAST-MODIFIED:20251113T200129Z
UID:3779-1763468100-1763471400@colleges.claremont.edu
SUMMARY:Non-vanishing of L-functions over function fields (Alexandra Florea\, UC Irvine)
DESCRIPTION:I will talk about some results concerning the non-vanishing of $L$-functions associated to fixed order characters $\ell$ at the central point over functions fields. Quadratic characters have been studied a lot over the years\, and very good non-vanishing results are available in this case\, due to work of Soundararajan. When focusing on cubic and higher order characters\, much less is known. In this talk\, I will explain how one can obtain a positive proportion of non-vanishing for any fixed order $\ell$ characters\, which goes to $0$ as $\ell$ goes to infinity. This is based on joint work with C. David and M. Lalin.
URL:https://colleges.claremont.edu/ccms/event/antc-talk-alexandra-florea-uc-irvine/
LOCATION:Estella 2099
CATEGORIES:Algebra / Number Theory / Combinatorics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251118T160000
DTEND;TZID=America/Los_Angeles:20251118T170000
DTSTAMP:20260423T223938
CREATED:20250917T201310Z
LAST-MODIFIED:20251114T165324Z
UID:3842-1763481600-1763485200@colleges.claremont.edu
SUMMARY:Claremont Topology Seminar: Chris Grossack (UC Riverside)
DESCRIPTION:We welcome all undergraduate/graduate students and faculty to attend topology seminar! \nSpeaker: Chris Grossack (UC Riverside) \nTitle: Explicitly Computing Fukaya Categories of Surfaces \nAbstract: Fukaya categories are rich and interesting invariants of symplectic manifolds that are often difficult to compute in practice. In the case of surfaces\, however\, the computation becomes pleasantly combinatorial\, and can be carried out explicitly. In this expository talk we’ll explain why one might care about Fukaya categories and how one can compute them explicitly enough for computer implementation using tools from “Noncommutative Mirror Symmetry”. With any remaining time\, we’ll explain the ideas behind the speaker’s PhD thesis\, which relies heavily on this machinery.
URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-chris-grossack-uc-riverside/
LOCATION:Fletcher 104\, Pitzer College\, 1050 N Mills Ave\, Claremont\, 91711\, United States
CATEGORIES:Topology Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251121T110000
DTEND;TZID=America/Los_Angeles:20251121T121500
DTSTAMP:20260423T223938
CREATED:20250923T141914Z
LAST-MODIFIED:20251119T170700Z
UID:3866-1763722800-1763727300@colleges.claremont.edu
SUMMARY:CCMS Colloquium: Shriya Nagpal (Pitzer)
DESCRIPTION:CCMS Colloquium invites you to a talk by Shriya Nagpal (Pitzer)\n\n \nTitle: Synchronization in Erdős–Rényi Graphs with Kuramoto Dynamics: A Graphon Approach\n \nAbstract: Networks of coupled Kuramoto oscillators have been used to model a wide array of phenomena\, including circadian rhythms\, flashing fireflies\, and high-voltage electric grids. In many such applications\, synchronization is an emergent behavior of interest. Recent work has focused on understanding synchronization in random networks of Kuramoto oscillators. We contribute to this literature\, by considering interaction networks generated by a graphon model known as a $W$-random network\, and examine the dynamics of an infinite number of identical ​ Kuramoto oscillators. We show that with sufficient regularity on $W$\, the solution to the dynamical system over a $W$-random network of size $n$ converges to the solution of the infinite graphon system\, with high probability as $n\rightarrow\infty$. We leverage this convergence result to study synchronization for identical Kuramoto oscillators on Erd\H{o}s-R\’enyi random graphs.\n \nBio: Shriya V. Nagpal is an Assistant Professor of Mathematics at Pitzer College. In 2024\, she completed her Ph.D. in Applied Mathematics at Cornell University\, where she was co-advised by Francesca Parise and Lindsay Anderson. Prior to joining Cornell in 2018\, she received her bachelor’s degree in Mathematics from Trinity College. Her research leverages tools from network theory and dynamical systems to study emergent behavior in interconnected systems.
URL:https://colleges.claremont.edu/ccms/event/ccms-colloquium-shriya-nagpal-pitzer/
LOCATION:Davidson Lecture Hall\, CMC\, 340 E 9th St\, Claremont\, CA\, 91711\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251128T110000
DTEND;TZID=America/Los_Angeles:20251128T121500
DTSTAMP:20260423T223938
CREATED:20250923T142737Z
LAST-MODIFIED:20250923T142753Z
UID:3869-1764327600-1764332100@colleges.claremont.edu
SUMMARY:NO CCMS Colloquium this Friday!
DESCRIPTION:We’ll be back next week! \nHappy Thanksgiving!
URL:https://colleges.claremont.edu/ccms/event/no-ccms-colloquium-this-friday/
LOCATION:Davidson Lecture Hall\, CMC\, 340 E 9th St\, Claremont\, CA\, 91711\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.edu
END:VEVENT
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