BEGIN:VCALENDAR
VERSION:2.0
PRODID:researchseminars.org
CALSCALE:GREGORIAN
X-WR-CALNAME:researchseminars.org
BEGIN:VEVENT
SUMMARY:Christopher Beem (Oxford)
DTSTART:20201102T200000Z
DTEND:20201102T210000Z
DTSTAMP:20260423T021414Z
UID:WHCGP/20
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/WHCGP/20/">H
 all-Littlewood chiral rings and derived Higgs branches</a>\nby Christopher
  Beem (Oxford) as part of Western Hemisphere colloquium on geometry and ph
 ysics\n\n\nAbstract\nI will discuss a relatively novel algebraic structure
  arising in four-dimensional N=2 superconformal field theories: the Hall-L
 ittlewood Chiral Ring (HLCR). The HLCR is an enhancement of the more famil
 iar Higgs branch chiral ring (which encodes the Higgs branch of the moduli
  space of vacua as an algebraic variety). The HLCR in gauge theories is co
 nstructed as the cohomology of a kind of BRST complex\, which allows it to
  be identified with the ring of functions on the derived Higgs branch (in 
 the sense of derived algebraic geometry). I will describe the solution of 
 the HLCR cohomology problem for a large class of Lagrangian theories (the 
 class S theories of type A1)\, which illustrate some interesting phenomena
 . This talk is based on work in progress with Diego Berdeja Suárez.\n
LOCATION:https://researchseminars.org/talk/WHCGP/20/
END:VEVENT
END:VCALENDAR