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X-ORIGINAL-URL:https://colleges.claremont.edu/ccms
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240903T121500
DTEND;TZID=America/Los_Angeles:20240903T131000
DTSTAMP:20260514T015016
CREATED:20240824T184428Z
LAST-MODIFIED:20240824T184428Z
UID:3465-1725365700-1725369000@colleges.claremont.edu
SUMMARY:Lattice angles and quadratic forms (Lenny Fukshansky\, CMC)
DESCRIPTION:What are the possible angles between two integer vectors in R^n? If we fix one such possible angle and one integer vector x\, is there always another integer vector y that makes this angle with x? Assuming that x makes a given angle with some vector\, how can we find the shortest such vector y? What if we designate a forbidden set of vectors\, what is the shortest y making a given angle with x outside of this forbidden set? It turns out that all of these questions can be reformulated in terms of a search for zeros of integral quadratic forms\, a rich arithmetic theory. We will give an introduction to this research direction and also show some of our recent results. Joint work with Sehun Jeong (CGU).
URL:https://colleges.claremont.edu/ccms/event/lattice-angles-and-quadratic-forms-lenny-fukshansky-cmc/
LOCATION:Estella 2099
CATEGORIES:Algebra / Number Theory / Combinatorics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240909T161500
DTEND;TZID=America/Los_Angeles:20240909T171500
DTSTAMP:20260514T015016
CREATED:20240909T231049Z
LAST-MODIFIED:20240909T231049Z
UID:3504-1725898500-1725902100@colleges.claremont.edu
SUMMARY:Applied Math Seminar: Christina Edholm (Scripps College)
DESCRIPTION:Title:    Controlling the unmanageable: insight into control methods for biological systems \nAbstract:\nWhen formulating a model for a biological system\, often we want to use the model to understand the implications of management options and how to optimize the implementation. There are various methods for implementing management through control theory\, ranging from basic\, optimal control\, adaptive control\, and more. We will discuss the different options for utilizing control for biological systems\, and when these different methods make the most sense. The applications focus on invasive species and epidemiology but can be broadened to various other applications.
URL:https://colleges.claremont.edu/ccms/event/applied-math-seminar-christina-edholm-scripps-college/
LOCATION:Estella 1021 (Emmy Noether Room)\, Pomona College\, Claremont\, CA\, 91711\, United States
CATEGORIES:Applied Math Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240910T121500
DTEND;TZID=America/Los_Angeles:20240910T131000
DTSTAMP:20260514T015016
CREATED:20240825T022632Z
LAST-MODIFIED:20240906T182843Z
UID:3469-1725970500-1725973800@colleges.claremont.edu
SUMMARY:Localization techniques in equivariant cohomology (Reginald Anderson\, CMC)
DESCRIPTION:In order to understand a topological space X\, it is often easier to understand X in terms of an action by a group G. When X is a compact complex manifold\, we often let G be products of S^1 or \C^* acting in a nice way (“holomorphically”) on X. This simplifies several calculations of an Euler characteristic by considering the torus-fixed loci; examples are given throughout.\n\nThe notes for this talk can be found here:\n\nhttps://drive.google.com/file/d/1FjhKDeJLIPQBlLA-x-BsnkosNayZMSAn/view?usp=sharing
URL:https://colleges.claremont.edu/ccms/event/localization-techniques-in-equivariant-cohomology-reginald-anderson-cmc-2/
LOCATION:Estella 2113
CATEGORIES:Algebra / Number Theory / Combinatorics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240910T150000
DTEND;TZID=America/Los_Angeles:20240910T160000
DTSTAMP:20260514T015016
CREATED:20240906T122226Z
LAST-MODIFIED:20240906T122236Z
UID:3495-1725980400-1725984000@colleges.claremont.edu
SUMMARY:Claremont Topology Seminar: Sam Nelson (CMC)
DESCRIPTION:We welcome all undergraduate/graduate students and faculty to attend topology seminar! \nSpeaker: Sam Nelson (CMC) \nTitle: Biquandle Module Quiver Representations \nAbstract: Biquandle module enhancements are invariants of knots and links generalizing the classical Alexander module invariant. A quiver categorification of these invariants was introduced in 2020. In this work-in-progress (joint with Yewon Joung from Hanyang University in Seoul) we take the next step by defining invariant quiver representations. As an application we obtain new polynomial knot invariants ae decategorifications.
URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-sam-nelson-cmc/
LOCATION:Estella 2099
CATEGORIES:Topology Seminar
ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240917T121500
DTEND;TZID=America/Los_Angeles:20240917T131000
DTSTAMP:20260514T015016
CREATED:20240824T183435Z
LAST-MODIFIED:20240906T183313Z
UID:3464-1726575300-1726578600@colleges.claremont.edu
SUMMARY:Biquandle module quiver representations (Sam Nelson\, CMC)
DESCRIPTION:Biquandle module enhancements are invariants of knots and links generalizing the classical Alexander module invariant. A quiver categorification of these invariants was introduced in 2020. In this work-in-progress (joint with Yewon Joung from Hanyang University in Seoul) we take the next step by defining invariant quiver representations. As an application we obtain new polynomial knot invariants as decategorifications.
URL:https://colleges.claremont.edu/ccms/event/antc-talk-sam-nelson-cmc-4/
LOCATION:Estella 2113
CATEGORIES:Algebra / Number Theory / Combinatorics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240917T150000
DTEND;TZID=America/Los_Angeles:20240917T160000
DTSTAMP:20260514T015016
CREATED:20240906T122404Z
LAST-MODIFIED:20240906T122541Z
UID:3496-1726585200-1726588800@colleges.claremont.edu
SUMMARY:Claremont Topology Seminar: Migiwa Sakurai (Shibaura Institute of Technology)
DESCRIPTION:We welcome all undergraduate/graduate students and faculty to attend topology seminar! \nSpeaker: Migiwa Sakurai (Shibaura Institute of Technology) \nTitle: Clasp pass moves and arrow polynomials of virtual knots \nAbstract: For classical knots\, clasp pass moves are closely related to Vassiliev invariants of degree 3. Tsukamoto showed that the values of the Vassiliev invariant of degree 3 induced from the Jones polynomial for two knots differ by 0 or +36/-36\, if they are related by a single clasp pass move. For virtual knots\, the arrow polynomial is a generalization of the Jones polynomial and induces a Vassiliev invariant of degree 3. We show that the values of the Vassiliev invariant of degree 3 induced from the arrow polynomial of two virtual knots differ by 0 or +2304/-2304\, if they are related by a single clasp pass move. We also obtain a lower bound of the distance between virtual knots by clasp pass moves.
URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-migiwa-sakurai-shibaura-institute-of-technology/
LOCATION:Estella 2099
CATEGORIES:Topology Seminar
ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240918T161500
DTEND;TZID=America/Los_Angeles:20240918T173000
DTSTAMP:20260514T015016
CREATED:20240902T155816Z
LAST-MODIFIED:20240906T130426Z
UID:3484-1726676100-1726680600@colleges.claremont.edu
SUMMARY:An Invitation to Enumerative Geometric Combinatorics (Andrés R. Vindas Meléndez\, Harvey Mudd College)
DESCRIPTION:Speaker: Andrés R. Vindas Meléndez\, Assistant Professor of Mathematics\, Harvey Mudd College\, Claremont CA \nTitle: An Invitation to Enumerative Geometric Combinatorics \nAbstract: Enumerative geometric combinatorics is an area of mathematics concerned with counting properties of geometric objects described by a finite set of building blocks. Lattice polytopes are geometric objects that can be formed by taking the convex hull of finitely many integral points. In this talk I will present background on polytopes\, lattice-point enumeration\, and share some results on special families and properties of polytopes that can be further studied. Throughout the talk I will present questions and open problems. \nBio:  Andrés R. Vindas Meléndez\,  is an Assistant Professor of Mathematics at Harvey Mudd College. His research interests are in algebraic\, enumerative\, and geometric combinatorics. His scholarly interests have also expanded to include mathematical & computational approaches and applications of data science and mathematics for social justice. He has also been a research member for the SLMath Fall 2023 program on Algorithms\, Fairness\, & Equity and a research scholar at the Institute for Computational and Experimental Research Mathematics [ICERM] for the program on Data Science & Social Justice: Networks\, Policy\, & Education during the Summers of 2022 and 2023. \nProf. Andrés strives to create community in order to build mathematics users’ confidence in spite of society’s negative messages and stigma about mathematics. He also aims to build meaningful and empowering experiences with mathematics\, while also challenging others to think about the power structures that are present in and outside mathematical spaces. \n 
URL:https://colleges.claremont.edu/ccms/event/an-invitation-to-enumerative-geometric-combinatorics/
LOCATION:Argue Auditorium\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Colloquium
GEO:34.0999157;-117.7142668
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240919T163000
DTEND;TZID=America/Los_Angeles:20240919T173000
DTSTAMP:20260514T015016
CREATED:20240910T035239Z
LAST-MODIFIED:20240910T035239Z
UID:3506-1726763400-1726767000@colleges.claremont.edu
SUMMARY:Analysis seminar: Gerald Beer (CSULA)
DESCRIPTION:Title: A crash course in Bornologies \nAbstract: By a bornology on a nonempty set X\, we mean a family of subsets that contains the singletons\, that is stable under finite unions\, and that is stable under taking subsets. The prototype for a bornology is the so-called metric bornology: the family of metrically bounded subsets of a metric space. Bornologies help us to understand large structure. We enumerate some basic bornologies and give a few applications. We give an old result of S.-T. Hu characterizing the bornologies on a metrizable space that are metric bornologies with respect to some compatible metric\, and give a fairly recent result of J. Cabello-Sanchez characterizing those metric spaces (X\,d) for which UC(X\,R) is a ring. We introduce the notion of bornological convergence of a sequence or net of closed subsets\, of which Attouch-Wets convergence is the prototype\, and give two applications to functional analysis.
URL:https://colleges.claremont.edu/ccms/event/analysis-seminar-gerald-beer-csula/
LOCATION:Estella 2393\, Pomona College\, 610 N. College Ave.\, Claremont\, 91711\, United States
CATEGORIES:Analysis Seminar
ORGANIZER;CN="Asuman Aksoy":MAILTO:asuman.aksoy@claremontmckenna.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240924T121500
DTEND;TZID=America/Los_Angeles:20240924T131000
DTSTAMP:20260514T015016
CREATED:20240825T022324Z
LAST-MODIFIED:20240825T022447Z
UID:3467-1727180100-1727183400@colleges.claremont.edu
SUMMARY:Presentations of derived categories (Reginald Anderson\, CMC)
DESCRIPTION:A modification of the cellular resolution of the diagonal given by Bayer-Popescu-Sturmfels gives a virtual resolution of the diagonal for smooth projective toric varieties and toric Deligne-Mumford stacks which are a global quotient of a smooth projective variety by a finite abelian group. In the past year\, Hanlon-Hicks-Lazarev gave a minimal resolution of the diagonal for toric subvarieties of smooth projective toric varieties. We give implications for exceptional collections on smooth projective toric Fano varieties in dimensions 1-4. This is joint work with CMC undergrads Justin Son\, Hill Zhang\, and Jumari Querimit-Ramirez.
URL:https://colleges.claremont.edu/ccms/event/localization-techniques-in-equivariant-cohomology-reginald-anderson-cmc/
LOCATION:Estella 2099
CATEGORIES:Algebra / Number Theory / Combinatorics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240925T041500
DTEND;TZID=America/Los_Angeles:20240925T173000
DTSTAMP:20260514T015016
CREATED:20240921T190045Z
LAST-MODIFIED:20240921T190045Z
UID:3529-1727237700-1727285400@colleges.claremont.edu
SUMMARY:A polyhedral view of refined q-t Catalan numbers (Max Hlavacek\, Pomona College)
DESCRIPTION:Title: A polyhedral view of refined q-t Catalan numbers \nSpeaker: Max Hlavacek Assistant Professor of Mathematics and Statistics department\, Pomona College\, Claremont \nAbstract: Many problems in algebraic combinatorics have geometric objects lurking in the background\, and bringing these objects forward can shed some light on the original problem.  We begin with an introduction to polyhedral cones and their connection to multivariable generating functions.  Then\, we pivot and introduce Catalan-Minggatu numbers and some of their generalizations\, including refined q-t Catalan numbers\, first introduced by Xin and Zhang in 2022. Finally\, we take a look at the polyhedral cones underlying these objects and see how these geometric objects can give us insight into open problems about refined q-t Catalan numbers. \nBio: Max Hlavacek is a Visiting Assistant Professor in the mathematics and statistics department at Pomona College.  Previously\, they were a graduate student at UC Berkeley and an undergraduate student at Harvey Mudd College.  They are interested in problems in enumerative geometric combinatorics\, particularly concerning discrete volumes of polytopes.  They love thinking about math with others\, and especially enjoy learning about the interplay between polyhedral objects such as cones and polytopes and their friends’ and collaborators’ mathematical interests. \nThe talk is based on joint work with Matthias Beck\, Mitsuki Hanada\, John Lentfer\, Andrés R. Vindas-Meléndez\, and Katie Waddle. \n 
URL:https://colleges.claremont.edu/ccms/event/a-polyhedral-view-of-refined-q-t-catalan-numbers-max-hlavacek-pomona-college/
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:20240930T161500
DTEND;TZID=America/Los_Angeles:20240930T171500
DTSTAMP:20260514T015016
CREATED:20240924T160708Z
LAST-MODIFIED:20240924T162100Z
UID:3537-1727712900-1727716500@colleges.claremont.edu
SUMMARY:Applied Math Seminar: Sarah Marzen (Department of Natural Science)
DESCRIPTION:Title: How well do neurons\, humans\, and artificial neural networks predict? \nAbstract: Sensory prediction is thought to be vital to organisms\, but few studies have tested how well organisms and parts of organisms efficiently predict their sensory input in an information-theoretic sense.  In this talk\, we report results on how well cultured neurons (“brain in a dish”) and humans efficiently predict artificial stimuli. We find that both are efficient predictors of their artificial input.  That leads to the question of why\, and to answer this\, we study artificial neural networks\, finding that LSTMs show similarly efficient prediction but do not model how humans learn well.  Instead\, it appears that an existing model of cultured neurons and a model of humans as order-R Markov modelers explain their performance on these prediction tasks.
URL:https://colleges.claremont.edu/ccms/event/applied-math-seminar-sarah-marzen-department-of-natural-science/
LOCATION:Emmy Noether Room\, Estella 1021\, Pomona College\,\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Applied Math Seminar
END:VEVENT
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