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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20240209T140851Z
DTSTART:20240213T140000Z
DTEND:20240213T150000Z
SUMMARY:Algebra seminar - Bethany Marsh
UID:{http://www.columbasystems.com/customers/uom/gpp/eventid/}i2dj-lpmf5c
ej-n8hruq
DESCRIPTION:Title: An introduction to tau-exceptional sequences.\n\nAbstr
act: Exceptional sequences in module categories over hereditary algebras
(e.g. path algebras of quivers) were introduced and studied by W. Crawl
ey-Boevey and C. M. Ringel in the early 1990s\, as a way of understandin
g the structure of such categories. They were motivated by the considera
tion of exceptional sequences in algebraic geometry by A. I. Bondal\, A.
L. Gorodontsev and A. N. Rudakov.\n\nExceptional sequences can also be
considered over arbitrary finite dimensional algebras\, but their behavi
our is not so good in general: for example\, complete sequences may not
exist. We look at different ways of generalising the theory from the her
editary case\, with a focus on tau-exceptional sequences\, recently intr
oduced in joint work with A. B. Buan (NTNU)\, motivated by the tau-tilti
ng theory of T. Adachi\, O. Iyama and I. Reiten\, and signed exceptional
sequences in the hereditary case defined by K. Igusa and G. Todorov.
STATUS:TENTATIVE
TRANSP:TRANSPARENT
CLASS:PUBLIC
LOCATION:Frank Adams 1\, Alan Turing Building\, Manchester
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