Abstract
Let p be a prime number. We compute the Yoneda extension algebra of GL 2 over an algebraically closed field of characteristic p by developing a theory of Koszul duality for a certain class of 2 functors, one of which controls the category of rational representations of GL 2 over such a field.
Original language  English 

Pages (fromto)  605648 
Number of pages  44 
Journal  Selecta Mathematica 
Volume  21 
Early online date  25 Jul 2014 
DOIs  
Publication status  Published  Apr 2015 
Keywords
 Koszul duality
 extension algebra
 GL2
 dg Algebra
 2Functor
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William Turner
Person: Academic