Twisted gamma-filtration of a linear algebraic group
  In the present notes we introduce and study the twisted gamma-filtration on K_0(G), where G is a split simple linear algebraic group over a field of characteristic prime to the order of the center of G. We apply this filtration to construct torsion elements in the gamma-ring of an inner form of the variety of Borel subgroups of G. 
Kirill Zainoulline
math.AG math.RA