Dimensions of triangulated categories via Koszul objects
  Lower bounds for the dimension of a triangulated category are provided. These bounds are applied to stable derived categories of Artin algebras and of commutative complete intersection local rings. As a consequence, one obtains bounds for the representation dimensions of certain Artin algebras. 
Petter Andreas Bergh, Srikanth B. Iyengar, Henning Krause, Steffen   Oppermann