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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260430T134630Z
DTSTART:20260501T130000Z
DTEND:20260501T140000Z
SUMMARY:Pure maths colloquium - Radha Kessar
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 z1-w19or0
DESCRIPTION:Speaker: Radha Kessar (University of Manchester)\n\nTitle: Ra
 tionality and quaternion blocks\n\nAbstract: To each indecomposable fact
 or (block) of a finite group algebra over a field of positive characteri
 stic p is associated a conjugacy class of finite p-subgroups of  the gro
 up called the defect groups of the block. A conjecture of Donovan predic
 ts that up to Morita equivalence there are only finitely many blocks wit
 h a given isomorphism class of defect group. Karin Erdmann's work from t
 he late 1980s yields an almost complete solution of this conjecture in t
 he case that  the defect group is  of tame representation type. There is
  only class of tame representation type which is still open - that of qu
 aternion defect group and two simple modules. I will report on ongoing j
 oint work with Charles Eaton\, Florian Eisele\, Markus Linckelmann and M
 andi Schaeffer Fry on this open case.\n\nRoom: Frank Adams 1\n\nWe will 
 also use this opportunity to celebrate Radha’s appointment to the Fielde
 n Chair in Pure Mathematics. The talk will be followed by a reception.
STATUS:TENTATIVE
TRANSP:TRANSPARENT
CLASS:PUBLIC
LOCATION:Frank Adams 1\, Alan Turing Building\, Manchester
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