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SUMMARY:The Letzter map for quantum symmetric pairs [Oberseminar Darstellu
 ngstheorie]
DTSTART:20250627T121500Z
DTEND:20250627T131500Z
DTSTAMP:20260305T180200Z
UID:indico-event-529@math-events.uni-bonn.de
DESCRIPTION:Speakers: Stefan Kolb (Newcastle)\n\nA crucial ingredient in t
 he theory of quantum symmetric pairs (QSP) is the quasi K-matrix which is 
 an analogue of the quasi R-matrix in the theory of quantum groups. The qua
 si K-matrix plays an important role in the construction of canonical bases
 \, universal K-matrices and braid group actions for quantum symmetric pair
 s. The quasi K-matrix is constructed by an intricate induction argument. 
 \nIn this talk\, I will explain how the quasi K-matrix can be directly obt
 ained from the quasi R-matrix via a projection map first considered by G. 
 Letzter. This was first observed in the quasi-split case in joint work wit
 h M. Yakimov\, but turns out to hold in full generality. The Letzter map c
 an also be used to obtain presentations of QSP-algebras in terms of genera
 tors and relations. \n\nhttps://math-events.uni-bonn.de/event/529/
LOCATION:Endenicher Allee 60/1.008- Seminarraum (Mathezentrum)
URL:https://math-events.uni-bonn.de/event/529/
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