Dimension des fibres de Springer affines pour les groupes
  Following Steinberg, we construct an adjoint quotient for the Vinberg semi-group and a section to this quotient. Then, after Ng\^o, we show the existence of a regular centralizer on it and use it to compute the affine Springer fibers for groups. 
Alexis Bouthier
math.AG math.GR math.RT