BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Claremont Center for the Mathematical Sciences - ECPv6.17.3.1//NONSGML v1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH 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: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 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:20250308T080000 DTEND;TZID=America/Los_Angeles:20250308T170000 DTSTAMP:20250212T183631Z CREATED:20250212T183309Z LAST-MODIFIED:20250212T183631Z UID:10002176-1741420800-1741453200@colleges.claremont.edu SUMMARY:N+12th Southern California Topology Colloquium DESCRIPTION:The Claremont Topology Seminar\, with funding from Pitzer College and the NSF\, is pleased to sponsor the N+12th Southern California Topology Colloquium (SCTC). SCTC is a one-day conference primarily attended by mathematicians from the Southern California area. This year\, the colloquium will be held at the Benson Auditorium at Pitzer College on \nSaturday\, March 8th\, 2025. \nAll talks will take place in Benson Auditorium on the Pitzer College campus. Light breakfast\, lunch\, coffee and snacks will be served in the foyer of Benson Auditorium. The speakers are \nDror Bar-Natan\, University of Toronto \nPatrick Orson\, California Polytechnic State University\, San Luis Obispo \nRhea Palak Bakshi\, University of California\, Santa Barbara \nSucharit Sarkar\, University of California\, Los Angeles \nThere is no registration fee\, but you must register to attend. More information can be found at the SCTC website below: \nhttps://sites.google.com/view/socaltopology/home   \n  \nContact SCTC 2025 organizers for more questions: \nBahar Acu\, \, Pitzer College\, Claremont Colleges \nKo Honda\, \, University of California\, Los Angeles \nYi Ni\, \, California Institute of Technology \nHelen Wong\, \, Claremont McKenna College\, Claremont Colleges \n  URL:https://colleges.claremont.edu/ccms/event/n12th-southern-california-topology-colloquium/ LOCATION:Benson Auditorium\, 1050 N Mills Ave.\, Claremont\, CA\, 91711\, United States CATEGORIES:Special Event,Topology Seminar ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20241203T150000 DTEND;TZID=America/Los_Angeles:20241203T160000 DTSTAMP:20241202T162645Z CREATED:20240928T045355Z LAST-MODIFIED:20241202T162645Z UID:10001937-1733238000-1733241600@colleges.claremont.edu SUMMARY:Claremont Topology Seminar: Rhea Palak Bakshi (University of California\, Santa Barbara) DESCRIPTION:We welcome all undergraduate/graduate students and faculty to attend topology seminar! \nSpeaker: Rhea Palak Bakshi (University of California Santa Barbara) \nTitle: The skein module of the connected sum of two copies of L(0\,1) \nAbstract: Abstract: Skein modules were introduced by Jozef H. Przytycki\, and independently by Vladmimor Turaev\, as generalisations of the Jones\, Kauffman bracket\, and HOMFLYPT polynomial link invariants in the 3-sphere to arbitrary 3-manifolds. The Kauffman bracket skein module (KBSM) is the most extensively studied of all. However\, computing the KBSM of a 3-manifold is known to be notoriously hard\, especially over the ring of Laurent polynomials. Marche conjectured that over the ring of Laurent polynomials\, the KBSM of closed oriented 3-manifolds splits into the sum of free and torsion modules. The counterexample to this conjecture is given by the connected sum of two copies of the real projective space. With the goal of finding a definite structure of the KBSM over this ring\, we compute the skein module of S^1 x S^2 # H_1 and S^1 x S^2 # S^1 x S^2. We show that it is isomorphic to the KBSM of a genus two handlebody modulo some specific handle sliding relations. Moreover\, these handle sliding relations can be written in terms of Chebyshev polynomials. We also discuss whether the KBSM of these manifolds splits into the sums of free and torsion modules. This is joint work with Seongjeong Kim\, Shangjun Shi\, and Xiao Wang. URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-rhea-palak-bakshi-university-of-california-santa-barbara/ LOCATION:Estella 2099 CATEGORIES:Topology Seminar ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20241105T150000 DTEND;TZID=America/Los_Angeles:20241105T160000 DTSTAMP:20241025T175032Z CREATED:20240928T045017Z LAST-MODIFIED:20241025T175032Z UID:10002166-1730818800-1730822400@colleges.claremont.edu SUMMARY:Claremont Topology Seminar: Vijay Higgins (UCLA) DESCRIPTION:We welcome all undergraduate/graduate students and faculty to attend topology seminar! \nSpeaker: Vijay Higgins (UCLA) \nTitle: Webs and skein algebras \nAbstract: The Jones polynomial of a link can be computed diagrammatically by using skein relations\, which encode the representation theory of SL(2). By considering the vector space spanned by links drawn on a surface and imposing these skein relations\, we obtain an algebra known as the Kauffman bracket skein algebra of the surface. These algebras have been studied by many authors\, including F. Bonahon and H. Wong\, and much is known about their structure. Replacing SL(2) by SL(3) or any other higher rank Lie group gives rise to a new skein algebra involving not only links but also certain graphs called webs. In this talk\, we will discuss some of the complications involved with studying skein algebras built from webs on surfaces and then present ways of getting around them. Some of this work is joint with F. Bonahon. URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-vijay-higgins-ucla/ LOCATION:Estella 2099 CATEGORIES:Topology Seminar ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20241001T150000 DTEND;TZID=America/Los_Angeles:20241001T160000 DTSTAMP:20240928T044059Z CREATED:20240928T044059Z LAST-MODIFIED:20240928T044059Z UID:10002165-1727794800-1727798400@colleges.claremont.edu SUMMARY:Claremont Topology Seminar: Reginald Anderson (CMC) DESCRIPTION:We welcome all undergraduate/graduate students and faculty to attend topology seminar! \nSpeaker: Reginald Anderson (CMC) \nTitle: Presentations of derived categories \nAbstract: 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/claremont-topology-seminar-reginald-anderson-cmc-3/ LOCATION:Estella 2099 CATEGORIES:Topology Seminar ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.edu END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20231128T150000 DTEND;TZID=America/Los_Angeles:20231128T160000 DTSTAMP:20231115T195911Z CREATED:20231115T195911Z LAST-MODIFIED:20231115T195911Z UID:10002148-1701183600-1701187200@colleges.claremont.edu SUMMARY:Claremont Topology Seminar: Melody Molander (UCSB) DESCRIPTION:Title: Skein Theory of Affine ADE Subfactor Planar Algebras \nAbstract: Subfactor planar algebras first were constructed by Vaughan Jones as a diagrammatic axiomatization of the standard invariant of a subfactor. These planar algebras also encode two other invariants of the subfactors: the index and the principal graph. The Kuperberg Program asks to find all diagrammatic presentations of subfactor planar algebras. This program has been completed for index less than 4. In this talk\, I will introduce subfactor planar algebras and give some presentations of subfactor planar algebras of index 4 which have affine ADE Dynkin diagrams as their principal graphs. URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-melody-molander-ucsb/ 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:20231114T150000 DTEND;TZID=America/Los_Angeles:20231114T160000 DTSTAMP:20231104T141022Z CREATED:20231104T140011Z LAST-MODIFIED:20231104T141022Z UID:10002147-1699974000-1699977600@colleges.claremont.edu SUMMARY:Geometry and Topology Seminar: Claremont Colleges Course Previews for Spring 2024 DESCRIPTION:On November 14th\, Tuesday from 3-4pm in Fletcher 110\, Geometry and Topology Seminar invites students and faculty to a course preview session devoted to a discussion and presentations about upcoming Spring 2024 courses in \n\ngeometry\,\ntopology and/or\nwith applications in geometry and topology\n\nto help students make their enrollment choices. \nWe will have some refreshments for all attending to enjoy! URL:https://colleges.claremont.edu/ccms/event/geometry-and-topology-seminar-claremont-colleges-course-previews-for-spring-2024/ 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:20231107T150000 DTEND;TZID=America/Los_Angeles:20231107T160000 DTSTAMP:20231016T154054Z CREATED:20230916T033519Z LAST-MODIFIED:20231016T154054Z UID:10002143-1699369200-1699372800@colleges.claremont.edu SUMMARY:Claremont Topology Seminar: Hyunki Min (UCLA) DESCRIPTION:Title: Contact structures and the mapping class group of lens spaces \nAbstract: One important problem in contact topology is to classify contact structures on a given manifold. Around 20 years ago\, Giroux and Honda classified contact structures on lens spaces. A natural question to ask after that is how the transformations on lens spaces interact with the contact structures. In this talk\, we study contactomorphisms on lens spaces\, which are diffeomorphisms preserving the contact structure. We show that the contact mapping class group of a standard contact lens space is a subgroup of the mapping class group of the lens space. URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-hyunki-min-ucla/ 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:20231031T150000 DTEND;TZID=America/Los_Angeles:20231031T160000 DTSTAMP:20231030T204415Z CREATED:20230918T204526Z LAST-MODIFIED:20231030T204415Z UID:10002145-1698764400-1698768000@colleges.claremont.edu SUMMARY:Claremont Topology Seminar: Konstantinos Varvarezos (UCLA) DESCRIPTION:Title: Cosmetic Surgeries on Knots and Heegaard Floer Homology \nAbstract: A common method of constructing 3-manifolds is via Dehn surgery on knots. A pair of surgeries on a knot is called purely cosmetic if the resulting 3-manifolds are homeomorphic as oriented manifolds\, whereas it is said to be chirally cosmetic if they result in homeomorphic manifolds with opposite orientations. An outstanding conjecture predicts that no nontrivial knots admit any purely cosmetic surgeries. We apply certain obstructions from Heegaard Floer homology to show that (nontrivial) knots which arise as the closure of a 3-stranded braid do not admit any purely cosmetic surgeries. Furthermore\, we find new obstructions to the existence of chirally cosmetic surgeries coming from Heegaard Floer homology; in particular\, we make use of immersed curve formulations of knot Floer homology and the corresponding surgery formula. Combining these with other obstructions involving finite type invariants\, we completely classify chirally cosmetic surgeries on odd alternating pretzel knots. Moreover\, we rule out cosmetic surgeries for L-space knots along slopes with opposite signs. URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-konstantinos-varvarezos-ucla/ 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:20231024T150000 DTEND;TZID=America/Los_Angeles:20231024T160000 DTSTAMP:20231017T231659Z CREATED:20230918T204340Z LAST-MODIFIED:20231017T231659Z UID:10002144-1698159600-1698163200@colleges.claremont.edu SUMMARY:Claremont Topology Seminar: Wenyuan Li (USC) DESCRIPTION:Title: Generating families on Lagrangian cobordisms \nAbstract: An important question in contact topology is to understand Legendrian knots and their relations given by Lagrangian cobordisms. In the contact manifold T*M x R\, an important tool to study Legendrian knots and their Lagrangian cobordisms is called generating families or generating functions\, which are generalizations of the defining functions f of graphical Legendrians of the form {(x\, df(x)\, f(x))}. When there exists a generating family with good control at infinity\, interesting Legendrian invariants can be extracted. We try to understand the following basic question: when can a generating function on the Legendrian knot be extended to the Lagrangian cobordism? We will give a necessary and sufficient condition to the problem for generating families with good control at infinity. In particular\, we show that such an extension always exists in the case of Lagrangian concordances. URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-wenyuan-li-usc/ 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:20231010T150000 DTEND;TZID=America/Los_Angeles:20231010T160000 DTSTAMP:20231006T052904Z CREATED:20230915T192038Z LAST-MODIFIED:20231006T052904Z UID:10002142-1696950000-1696953600@colleges.claremont.edu SUMMARY:Claremont Topology Seminar: Christopher Perez (Loyola University New Orleans) DESCRIPTION:Title: Towers and elementary embeddings in total relatively hyperbolic groups \nAbstract: In a remarkable series of papers\, Zlil Sela classified the first-order theories of free groups and torsion-free hyperbolic groups using geometric structures he called towers. It was later proved by Chloé Perin that if H is an elementarily embedded subgroup (or elementary submodel) of a torsion-free hyperbolic group G\, then G is a tower over H. We prove a generalization of Perin’s result to toral relatively hyperbolic groups using JSJ and shortening techniques. URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-christopher-perez-loyola-university-new-orleans/ 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:20231003T150000 DTEND;TZID=America/Los_Angeles:20231003T160000 DTSTAMP:20231006T052910Z CREATED:20231006T052456Z LAST-MODIFIED:20231006T052910Z UID:10002129-1696345200-1696348800@colleges.claremont.edu SUMMARY:Claremont Topology Seminar: Julian Chaidez (USC) DESCRIPTION:Title: Quantum 4-Manifold Invariants Via Trisections \nAbstract: I will describe a new family of potentially non-semisimple invariants for compact a 4-manifold whose boundary is equipped with an open book. The invariant is computed using a trisection\, along with some additional combing data\, and a piece of algebraic data called a Hopf triple. The relationship with other recent works on non-semisimple 4-manifold invariants\, like the work of Costantino-Geer-Patureau-Mirand-Virelizier\, is not yet clear. This talk is based on joint work with Shawn Cui (Purdue) and Jordan Cotler (Harvard). URL:https://colleges.claremont.edu/ccms/event/claremont-topology-seminar-julian-chaidez-usc/ 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:20230926T150000 DTEND;TZID=America/Los_Angeles:20230926T160000 DTSTAMP:20230922T154321Z CREATED:20230922T154321Z LAST-MODIFIED:20230922T154321Z UID:10002146-1695740400-1695744000@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 (Continued) \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-2/ 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:20230919T150000 DTEND;TZID=America/Los_Angeles:20230919T160000 DTSTAMP:20230918T204921Z CREATED:20230915T191657Z LAST-MODIFIED:20230918T204921Z UID:10002141-1695135600-1695139200@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:20231006T053002Z CREATED:20230913T073733Z LAST-MODIFIED:20231006T053002Z UID:10002120-1694530800-1694534400@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:20211207T150000 DTEND;TZID=America/Los_Angeles:20211207T160000 DTSTAMP:20211011T195808Z CREATED:20210914T225152Z LAST-MODIFIED:20211011T195808Z UID:10001965-1638889200-1638892800@colleges.claremont.edu SUMMARY:Topology Seminar DESCRIPTION: URL:https://colleges.claremont.edu/ccms/event/topology-seminar-2021-09-21-2021-10-26/2021-12-07/ 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:20211130T150000 DTEND;TZID=America/Los_Angeles:20211130T160000 DTSTAMP:20211011T195808Z CREATED:20210914T225152Z LAST-MODIFIED:20211011T195808Z UID:10001964-1638284400-1638288000@colleges.claremont.edu SUMMARY:Topology Seminar DESCRIPTION: URL:https://colleges.claremont.edu/ccms/event/topology-seminar-2021-09-21-2021-10-26/2021-11-30/ 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:20211116T150000 DTEND;TZID=America/Los_Angeles:20211116T160000 DTSTAMP:20211011T195808Z CREATED:20210914T225152Z LAST-MODIFIED:20211011T195808Z UID:10001963-1637074800-1637078400@colleges.claremont.edu SUMMARY:Topology Seminar DESCRIPTION: URL:https://colleges.claremont.edu/ccms/event/topology-seminar-2021-09-21-2021-10-26/2021-11-16/ 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:20211109T150000 DTEND;TZID=America/Los_Angeles:20211109T160000 DTSTAMP:20211011T195808Z CREATED:20210914T225152Z LAST-MODIFIED:20211011T195808Z UID:10001962-1636470000-1636473600@colleges.claremont.edu SUMMARY:Topology Seminar DESCRIPTION: URL:https://colleges.claremont.edu/ccms/event/topology-seminar-2021-09-21-2021-10-26/2021-11-09/ 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:20211102T150000 DTEND;TZID=America/Los_Angeles:20211102T160000 DTSTAMP:20211011T195808Z CREATED:20210914T225152Z LAST-MODIFIED:20211011T195808Z UID:10001961-1635865200-1635868800@colleges.claremont.edu SUMMARY:Topology Seminar DESCRIPTION: URL:https://colleges.claremont.edu/ccms/event/topology-seminar-2021-09-21-2021-10-26/2021-11-02/ 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:20211026T150000 DTEND;TZID=America/Los_Angeles:20211026T160000 DTSTAMP:20211011T195808Z CREATED:20210914T225152Z LAST-MODIFIED:20211011T195808Z UID:10001960-1635260400-1635264000@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:20211011T195957Z CREATED:20210914T225152Z LAST-MODIFIED:20211011T195957Z UID:10001959-1634050800-1634054400@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:20210914T230121Z CREATED:20210914T225152Z LAST-MODIFIED:20210914T230121Z UID:10001958-1633446000-1633449600@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:20210914T225958Z CREATED:20210914T225152Z LAST-MODIFIED:20210914T225958Z UID:10001957-1632841200-1632844800@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:20210914T225937Z CREATED:20210914T225152Z LAST-MODIFIED:20210914T225937Z UID:10001956-1632236400-1632240000@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:20210406T011522Z CREATED:20210204T004751Z LAST-MODIFIED:20210406T011522Z UID:10001715-1619626500-1619631000@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:20210418T004801Z CREATED:20210204T004641Z LAST-MODIFIED:20210418T004801Z UID:10001904-1619021700-1619026200@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:20210326T180738Z CREATED:20210204T004536Z LAST-MODIFIED:20210326T180738Z UID:10001903-1618416900-1618421400@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:20210324T171332Z CREATED:20210204T004426Z LAST-MODIFIED:20210324T171332Z UID:10001902-1617812100-1617816600@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:20210312T000546Z CREATED:20210204T004224Z LAST-MODIFIED:20210312T000546Z UID:10001901-1617207300-1617211800@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:20210312T000436Z CREATED:20210204T004055Z LAST-MODIFIED:20210312T000436Z UID:10001900-1616602500-1616607000@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 END:VCALENDAR