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SUMMARY:David Vogan (MIT)
DTSTART:20221208T153000Z
DTEND:20221208T170000Z
DTSTAMP:20260422T145902Z
UID:atlas/49
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/atlas/49/">A
 nnegret Paul's magic script</a>\nby David Vogan (MIT) as part of Real redu
 ctive groups/atlas\n\n\nAbstract\nA unipotent Arthur packet is attached to
  a nilpotent class in the dual group\, and a finite amount of additional d
 ata. A weak pack is the union of all packets attached to a single nilpoten
 t class\; the software has been able to compute those (with great effort!)
  for a long time. Annegret Paul has a new script which can (conjecturally)
  compute actual Arthur packets for those nilpotents in the dual group whic
 h are principal in some Levi. Often this is most nilpotents\; for E8\, it 
 is 41 of the 70 nilpotent classes.\n\nI will recall the theoretical conjec
 ture required to PROVE this (without it\, we know only that the script is 
 producing _part of_ an honest Arthur packet)\; then spend most of the time
  looking carefully at how the script works. This is meant to be an exercis
 e both in theory and in scripting for atlas.\n
LOCATION:https://researchseminars.org/talk/atlas/49/
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