SMRI Seminar: Jakob -- A Deligne-Simpson problem for irregular G-connections over P^1

SMRI Seminar: 
’A Deligne-Simpson problem for irregular G-connections over P^1’
Konstantin Jakob (Technical University of Darmstadt)

Thursday 16 November
1:00-2:00pm (AEDT) 
Carslaw 375 

Abstract: The Deligne-Simpson problem asks for a criterion for the existence of a 
connection on a punctured P^1 with prescribed singularities. I will explain joint work 
with Zhiwei Yun on a generalization of this problem for G-connections on P^1 with two 
singularities, only one of which is a regular singularity, where G is any complex 
reductive group. We give a geometric and a representation-theoretic existence criterion, 
and use them to solve the Deligne-Simpson problem in many cases.

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Please join us after the seminar for SMRI afternoon tea, 2:00-2:45pm every Thursday on
the SMRI Terrace (accessed through A14-04-L4.36) 

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