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DTSTAMP:20250928T215807
DTSTART;TZID=America/Detroit:20250909T090000
DTEND;TZID=America/Detroit:20250909T100000
SUMMARY:Livestream / Virtual:Pfaffians as τ -functions of the BKP hierarchy: a constructive parametrization of complex pure spinors de E. Cartan
DESCRIPTION:It is well known that τ -functions of KP hierarchy are parameterized by points in Sato’s Universal Grassmannian manifold (UGM). These τ -functions have Schur expansions with coefficients satisfying Plücker relations. In this talk we will show that all τ -functions of BKP hierarchy can be written as Pfaffians of skew-symmetric matrices. These τ -functions are parameterized by points in the universal orthogonal Grassmannian manifold (UOGM). They have natural Schur-Q expansions with coefficients satisfying Cartan-Plücker relations. As a byproduct this parameterization gives a constructive description for complex pure spinors de E. Cartan. As an application\, we reprove a theorem due to A. Alexandrov which states that τ -functions of KdV satisfy BKP up to rescaling of the time parameters by 2. We prove this by showing that the KdV hierarchy can be viewed as 4-reduction of the BKP hierarchy. This interpretation gives complete characterization for the KdV orbits nside the BKP hierarchy. This talk is based on preprint arXiv:2210.03307.
UID:138593-21883425@events.umich.edu
URL:https://events.umich.edu/event/138593
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics,Seminar,Virtual
LOCATION:Off Campus Location
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20250806T172347
DTSTART;TZID=America/Detroit:20250909T090000
DTEND;TZID=America/Detroit:20250909T200000
SUMMARY:Exhibition:Suave Mechanicals: A Celebration of Nine Volumes on the Art and History of Bookbinding (2013–2025)
DESCRIPTION:Explore the art of judging books by their covers! This exhibit highlights a selection of rare books from the University of Michigan's collections\, each of them representing binding topics featured in \"Suave Mechanicals\,\" the acclaimed nine-volume series dedicated to the study of the art and history of bookbinding.  \n\nSpanning from 2013 to 2025\, \"Suave Mechanicals\" contains 85 essays\, 27 of which examine the same type of binding as the artifacts on display. Edited by Julia Miller and published by Cathleen A. Baker of The Legacy Press\, the series was conceived as a platform for fresh\, in-depth scholarship on bookbinding\, from its earliest origins to contemporary practice.  \n\nContributors include first-time authors and established experts — bookbinders\, conservators\, librarians\, curators\, catalogers\, book artists\, collectors\, and historians — offering a vibrant array of voices and insights into the craftsmanship\, culture\, and enduring fascination of bookbinding.\n\nJoin us for Coffee with the Curator on October 1\, 10am-12pm.
UID:137103-21879550@events.umich.edu
URL:https://events.umich.edu/event/137103
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Books,Free,Library
LOCATION:Hatcher Graduate Library - Hatcher Gallery Exhibit Room (1st floor)
CONTACT:
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